AC/DC Power adapter

AC/DC power adapter for a laptop

AC/DC power adapter as known as power supply or power brick converts the high voltage AC power from a wall outlet into the low voltage DC power needed for your laptop.

The AC/DC adapter provides power for the laptop and charges the battery. It’s very important to use the right adapter for your laptop.

If you are looking for a new adapter, you should check the following:
1. Your new adapter must have exactly the same plug (adapter tip) as the original one.
2. Your new adapter must output exactly the same voltage as the original one.
3. Polarity on the new adapter’s plug must be the same as on the original one.

You can find the output voltage and amperage on the adapter’s label. As you see on the picture below, my adapter outputs 19V-3.42A.

AC/DC power adapter voltage and amperage

When you buy a new adapter, you can follow this rule:
The output voltage must be the same, the amperage could be the same or higher than on the original power adapter.

For example, if my laptop requires 19v-3.42A adapter, I can safely use 19v-3.95A adapter.

HOW TO TEST OR REPAIR POWER ADAPTERS.

Most newer laptop power adapters are sealed and you cannot repair them. If the adapter is dead, you’ll have to buy a new one.

1. How can you tell if the AC adapter is dead? You can test it with a voltmeter. On the picture below I’m testing a 15V adapter and as you see the output is 15.45V. It’s pretty normal and there is nothing wrong if the output voltage is a little bit higher but if you are getting 0V, the adapter is definitely bad.

Test laptop AC/DC power adapter

2. If you accidentally damaged the adapter plug, you can replace it with a new one. Just make sure the new plug has the same size as the old one. Cut off the old damaged plug and solder a new one.

Posted in Laptop parts
186 comments on “AC/DC Power adapter
  1. Sam says:

    My power adapter is dead. As you mentioned in the post, I tested my adapter with a multimeter and there is no voltage coming out.
    I have a question. My old adapter was rated 19V and I’m thinking about replacing it with a universal adapter, you know the one with a variable voltage output. The universal adapter puts out 12-24V. Should I buy it or should I search for the original adapter?

  2. admin says:

    Sam,

    My old adapter was rated 19V and I’m thinking about replacing it with a universal adapter, you know the one with a variable voltage output. The universal adapter puts out 12-24V. Should I buy it or should I search for the original adapter?

    That’s a good question. I know that universal adapters work but I personally don’t trust them.
    Just recently I was troubleshooting a laptop with a universal adapter. The laptop was working fine but it for some reason it didn’t charge the battery. The laptop worked with or without battery installed, so the adapter was providing power.
    The problem was fixed as soon as I replace the universal adapter with the original adapter.
    I would recommend to buy the original adapter. That’s my two cents.

  3. Andrea says:

    I have universal adapter and it works with my HP notebook.
    I had this adapter for 2 years and no problems.
    Andrea

  4. ron says:

    I pulled the cable to hard and broke the power socket in the laptop. The center pin broke off of the socket and stuck inside the plug. :(

  5. Repair Man says:

    ron,

    The center pin broke off of the socket and stuck inside the plug.

    You’ll have to replace the power socket, that’s for sure. If you cannot remove the pin from the plug, you’ll have to replace the power adapter too or cut off the old plug and solder a new one.

  6. Peter says:

    Thanks. I found a new plug for my adapter and installed it. Looks goofy but works!

  7. Natali R says:

    I have a 3 years old Toshiba notebook. It fails but I cannot figure out what’s going on.
    The battery charges when the notebook is off. When I turn it on, it starts but the battery charge light goes off. I can make it work if I move the adapter tip in the laptop. When I release the tip the battery light goes off again.
    Here’s the strange thing. When I turn off notebook than unplug the adapter and plug it back into the laptop, the battery starts charging again and the battery charge light works until I turn on the notebook. Do you think my adapter is failing? Should I buy a new adapter?

  8. Repair Man says:

    Natali R.

    The battery charges when the notebook is off. When I turn it on, it starts but the battery charge light goes off.

    I think there is a problem with the DC-IN power jack – the socket where you plug the AC adapter. Apparently, the power jack is not making good connection with the motherboard and has to be replaced or resoldered. I’ve seen this problem happening many times before on Toshiba Satellite M35X and A75 laptops.

    Do you think my adapter is failing? Should I buy a new adapter?

    I don’t think that a new adapter will fix your problem. The battery is charging fine when the laptop is off, right? Most likely the adapter is working correctly.

    the battery charge light works until I turn on the notebook

    Here’s something to try. Turn on the notebook and wait until the battery charging light goes off. Now move the tip of the AC adapter inside the socket. Does the battery charging light light up or flicker when you move the adapter tip? If it does, there is a problem with the power jack.

  9. Semir E. says:

    Hey,
    I got a Sony Vaio VGN-FZ240E, and a few days ago my power adapter seemed to have shut off and at the same time my laptop just shut down. Then from then on my power supply, the led light doesn’t turn on or even charge my battery anymore, all i hear is a faint “click click” noise as i plug in the power supply to the outlet. Just ordered a same power supply, but I rather know what the problem is first before it happens again.

  10. Repair Man says:

    Semir E.

    I got a Sony Vaio VGN-FZ240E, and a few days ago my power adapter seemed to have shut off and at the same time my laptop just shut down. Then from then on my power supply, the led light doesn’t turn on or even charge my battery anymore, all i hear is a faint “click click” noise as i plug in the power supply to the outlet.

    Could be bad power adapter. Try replacing the adapter first. If you still experience the same problem even with a new adapter, take a closer look at the power jack. There could be a problem with the power jack inside the laptop. Just recently I had to replace a broken power jack on a Sony Vaio VGN-FZ220 laptop. I think it’s similar to your Sony laptop.

  11. HP ze4800 says:

    I have a ZE4800 that I have replaced my adapter with the replacement from HP. The replacement had a plug size adapter that went from a smaller size to a larger size to fit the laptop. I have broken the plug size adapter. The power adapter works, but will not fit the laptop now. Where can I find just the small plug adapter instead of buying a complete new power supply?

  12. Repair Man says:

    HP ze4800,

    The replacement had a plug size adapter that went from a smaller size to a larger size to fit the laptop.

    I really don’t like that adapter. I know what you are talking about, I’ve seen something like that on Toshiba adapters.
    I think this is really bad design because you can easily damage the power jack.

    Where can I find just the small plug adapter instead of buying a complete new power supply?

    I’ve tried searching but I didn’t find any. I doubt that you can find this piece separately from the adapter. Fortunately, adapters for HP Pavilion ze4800 are not expensive at all.

  13. Ara says:

    I have developed a tear in the AC adapter at the location in which it connects with the black box. The rubber is torn and the silver wire threads are showing and beginning to fray and be torn. Is there any way to fix this? Thanks

  14. Repair Man says:

    Ara,

    I have developed a tear in the AC adapter at the location in which it connects with the black box. The rubber is torn and the silver wire threads are showing and beginning to fray and be torn. Is there any way to fix this?

    I don’t think that you can fix that. The AC adapter is a sealed unit and you cannot take it apart, cut off the damage part of the cord and reattach it back to the adapter.
    If the power cord is damaged, you’ll have to replace the whole unit and in your case I would do that as soon as possible. If you accidentally short wires inside the power cord while your adapter is connected to the laptop, you can damage the laptop.

  15. Kerri says:

    Hello. I have about the same problem with my DC power jack and I am convinced this is the’problem’ however, I only had my computer for two years now and I am not able to find the part I need; not even on the Toshiba website (Toshiba Satellite A135-s2266) I had to replace the power adapter once before and maybe that worked for about 2 or three months because the plug was tighter or something, I’m not sure but I really need to find a DC power jack because this is very frustrating – or buy a new computer which is really going to stress me out because I bought both my boys one for Christmas and we really cannot afford another. But on a good note, Toshiba pays you to recycle your old computer :) –Makes me a little happier.

    Thanks,
    Kerri
    Brohdaw AT comcast.net

  16. Repair Man says:

    Kerri,

    I have about the same problem with my DC power jack and I am convinced this is the’problem’ however, I only had my computer for two years now and I am not able to find the part I need; not even on the Toshiba website (Toshiba Satellite A135-s2266)…I really need to find a DC power jack

    Unfortunately, on that particular model the power jack harness is permanently attached to the motherboard. Toshiba doesn’t sell this power jack harness separately and there is no power number for that harness.
    Basically, you have four options:
    1. Purchase a new motherboard and replace it.
    2. Find a damaged motherboard somewhere (maybe eBay) and use the power jack harness from there.
    3. Purchase a generic power jack in RadioShack which fits your adapter and make a modification. Cut off the damaged original jack and replace it with a generic one.
    4. Use a similar power jack harness from another laptop. I’m not sure if you can do that but I’ll take a look tomorrow when I’ll be at work. Maybe I can find something similar and give you the part number. Cannot promise.

  17. Help Need says:

    I have a Acer laptop which erratically shuts itself off. I do not believe it is due to over heating based on several diagnostics I have completed. I do, however, have an AC adapter which shows wear around the area where the cord meets the Adapter. Through the rubberized area where the cord meets the Adapter, I can see the wires. I have wrapped this area with electrical tape to stabilize it, however, the problem remains. Do you think the erratic shut down is due to the AC adapter problem? Or, do I have two problems?

  18. Repair Man says:

    Help Needed,

    I do, however, have an AC adapter which shows wear around the area where the cord meets the Adapter. Through the rubberized area where the cord meets the Adapter, I can see the wires. I have wrapped this area with electrical tape to stabilize it, however, the problem remains. Do you think the erratic shut down is due to the AC adapter problem?

    I don’t know but I think you can test the adapter with a voltmeter. Plug the adapter into the wall outlet and test the voltage output on the adapter. Now move the power cable and find out if power cuts off when you touch/bent the damaged area of the cord. If it does, apparently that’s your problem. It’s just a guess.

  19. Rob says:

    Help with Toshiba,
    I have a Toshiba P105-S6084 purchased in 2006. I purchased the extended “Geek” warrenty and didn’t have any issues until January of 2009. My screen had blue lines going down it, 2 usb ports broke and the AC adapter quick working. I took it to the retail outlet and they replaced the LCD Screen, Motherboard and mailed me a replacement ac adapter. All in all, a brand new computer for free. My problem is the AC Adapter had 5 different size heads and only one of them fit the outlet. This worked fine for 30 days or so and then the battery light started blinking and it would not charge. I went back and they mailed me a new battery. It arrived fully charged and the laptop functioned well, unplugged. Once I ran it down to 80%, the battery would not charge when plugged in but the icon read “80% plugged in, charging”. In would not charge and actual slowly discharged while plugged in. Now I have the icon reading 100%, plugged in, not charging”. When I unlug the adapter, the computer turns off. If I try and turn it on, nothing.

    I believe this to be a AC Adapter problem as the motherboard is brand new. I called the retail store holding the warrenty and they are giving me the run around. Before I buy a new AC Adapter, or send it away for another 2 weeks, I thouht I would post to get some opinions.

  20. Repair Man says:

    Rob,

    My problem is the AC Adapter had 5 different size heads and only one of them fit the outlet.

    I really hate all these generic AC adapter with multiple heads and variable voltage output. I don’t trust them at all.

    This worked fine for 30 days or so and then the battery light started blinking and it would not charge. I went back and they mailed me a new battery. It arrived fully charged and the laptop functioned well, unplugged. Once I ran it down to 80%, the battery would not charge when plugged in but the icon read “80% plugged in, charging”.

    At this point it’s hard to tell what is causing the problem. That could be just a faulty AC adapter, maybe it’s not providing enough power for your laptop. Or there could be something wrong with the motherboard, maybe the battery charging circuit is not working properly.
    The only way to find out what is wrong is testing the laptop with another known good AC adapter. I would suggest testing the laptop with an original Toshiba adapter.
    Just in case I’ll give you the part number for a new Toshiba adapter. You can use A000005020 or A000006140. Do you still have the power cord for your original adapter? If not you might need a new cord: A000001040.
    Google part numbers and you’ll find them.

    I believe this to be a AC Adapter problem as the motherboard is brand new.

    Yep, I would try replacing the adapter first. By the way, I don’t want to frustrate you but most likely the new motherboard is not brand new. Most likely it’s a refurbished one, so it might have a problem too.

    I called the retail store holding the warrenty and they are giving me the run around. Before I buy a new AC Adapter, or send it away for another 2 weeks, I thought I would post to get some opinions.

    There is not much you can do without new AC adapter, you’ll have to get a new one. If the laptop still fails even after you replace the adapter, there must be a problem with the motherboard.

  21. mohamad says:

    Hi, my laptop is from Toshiba brand, model A200-204,when i connect the power supply, it’s hard to insert it into the DC jack socket, i feel now that the DC power socket is not rigid anymore even my laptop still new, and i don’t have problem with electric supply.
    1-Is the DC power jack builted on the motherboard or it’s external & wired to the motherboard?
    2-the power jack ,can be damaged over time?, is it possible to fix it easily?
    3-What is the good way to aboid damaging this power jack(inside the laptop), even i insert the connector with care ?
    Thanks for your help.

  22. Repair Man says:

    mohamad,

    Hi, my laptop is from Toshiba brand, model A200-204,when i connect the power supply, it’s hard to insert it into the DC jack socket, i feel now that the DC power socket is not rigid anymore even my laptop still new, and i don’t have problem with electric supply.

    1-Is the DC power jack builted on the motherboard or it’s external & wired to the motherboard?

    In a Satellite A200/A205 the power jack is attached to a cable which can be unplugged from the motherboard.

    2-the power jack ,can be damaged over time?, is it possible to fix it easily?

    You cannot tell which part is damaged until you disassemble the laptop and take a look inside. It could be damaged DC-IN jack or base assembly.

    3-What is the good way to aboid damaging this power jack(inside the laptop), even i insert the connector with care ?

    Just be careful. Apparently it’s not a good design. But you can replace it with a more rigid generic jack from RadioShack.

  23. Tom says:

    What if my original output in my box is 3.95a can i still use one thats 3.42a. I tried it works but i just want to be sure it wont blow up and set the neighboorhood on fire.

  24. Repair Man says:

    Tom,

    What if my original output in my box is 3.95a can i still use one thats 3.42a. I tried it works but i just want to be sure it wont blow up and set the neighboorhood on fire.

    The laptop might run fine with a 3.42A adapter but I’m not sure what kind of damage it can cause in the future. Toshiba doesn’t recommend using AC adapters with lower amperage. If the laptop runs fine and the battery charges properly, you should be fine. I guess it could take more time to charge the battery.

  25. Laura says:

    I need a new adapter for an R50e model IBM Lenovo Thinkpad. The adapter is fine, I think, but I lost the cord that connects the outlet to the adapter. Where do I buy a replacement – can I find it in stores like Best Buy or do I need to order it specially online? Thanks for any help.

  26. Pia says:

    hi again! can i ask where can i buy cheaper priced ac adapters. my puppy (sad) chew on the wire near the edge of the adapter [box-where all the voltages, amps and other languages are written] and it doesnt work now when i plug it in. thanks in advance. and i hope you reply. btw its a compaq, 2 years old. and it says at the back that i can replace it with hp spare 402018-001.

  27. Desperate says:

    I have lost my power adapter for my Asus M50Vc notebook and was wondering if i could use a smaller adapter to charge my notebook.

    The adapter that i had originally:

    AC adapter power dissipation – 90 W
    AC adapter output current – 4.7 A
    AC adapter output voltage – 19 V
    AC adapter frequency – 50/60 Hz
    AC adapter input voltage – 100 – 240 V

    So is it possible to use an adapter that has a lower Amperage value? for example 3.4A instead of 4.7A

  28. Repair Man says:

    Desperate,

    So is it possible to use an adapter that has a lower Amperage value? for example 3.4A instead of 4.7A

    The amperage value has to be the same or higher, not lower.

  29. John says:

    I’m currently using an adaptor of 19v 4.22amps. The original adaptor was 19v 7.1amps. Is this safe? The adaptor does get quite hot but otherwise seems to be ok.

    Also the battery will not charge if it is below 80% charge when I am using the laptop but as soon as I turn it off and providing the ac is still connected it’ll recharge.

    Thanks.

  30. manjesh says:

    what if we use 19v 6.3 amp instead for a laptop with 19v 3.95 amph

    this much difference can be adjusted ?

  31. Repair Man says:

    manjesh,

    what if we use 19v 6.3 amp instead for a laptop with 19v 3.95 amph

    No problem! The voltage is exactly the same and the amperage is higher than required by the laptop. It is safe to use a 19V-6.3A adapter.

  32. Duke says:

    Hi, I was wondering if you have had any experiences with hp laptop supplies. The supplied Ac to Dc power (90W) supply outputs 19V dc. The dc connection to the laptop has a round connector, with three connect points, with voltages measured at 19V centre pin, 19.8V inner scraper, 0V outer scraper connection. I have purchased an non-hp dc-dc convertor (150W), 12V input, 19V output. I had to link the two centre and inner scraper connections together on the lead, to achieve a voltage on both of them. (Battery is removed). The laptop performs very very slowly with this dc-dc convertor, but still performs fine with the AC/DC supply. The dc-dc convertor should easily supply the power requirement of approx 70W, as it is rated at 150W. Any ideas?

  33. joseph says:

    Hi,

    I have 2 notebooks (one is Dell and the other one HP) I realized that I have switched the power adapter using the Dell for the HP. When I compared both the Dell has was 19.5V and 4.62A while the HP was 18.5V and 3.5A

    I know you said that a higher amp was ok but I’m worried that using a higher voltage (+1V) on my HP would have damaged it.

    I used the wrong adapter for probably 10 hrs. What damaging effect would it have on my computer or battery?

    Thank you for your help.

  34. Repair Man says:

    John,

    I’m currently using an adaptor of 19v 4.22amps. The original adaptor was 19v 7.1amps. Is this safe? The adaptor does get quite hot but otherwise seems to be ok.

    I don’t think it is safe. You can damage the motherboard.

    Also the battery will not charge if it is below 80% charge when I am using the laptop but as soon as I turn it off and providing the ac is still connected it’ll recharge.

    Maybe it happens because the laptop is underpowered. Again, I would use an adapter suggested by the manufacturer.

  35. Repair Man says:

    Duke,

    I was wondering if you have had any experiences with hp laptop supplies. The supplied Ac to Dc power (90W) supply outputs 19V dc. The dc connection to the laptop has a round connector, with three connect points, with voltages measured at 19V centre pin, 19.8V inner scraper, 0V outer scraper connection. I have purchased an non-hp dc-dc convertor (150W), 12V input, 19V output. I had to link the two centre and inner scraper connections together on the lead, to achieve a voltage on both of them. (Battery is removed). The laptop performs very very slowly with this dc-dc convertor, but still performs fine with the AC/DC supply. The dc-dc convertor should easily supply the power requirement of approx 70W, as it is rated at 150W. Any ideas?

    Have you considered buying the original AC adapter? Maybe the laptop performs very slowly because it is underpowered.

  36. Repair Man says:

    joseph,

    I have 2 notebooks (one is Dell and the other one HP) I realized that I have switched the power adapter using the Dell for the HP. When I compared both the Dell has was 19.5V and 4.62A while the HP was 18.5V and 3.5A

    I know you said that a higher amp was ok but I’m worried that using a higher voltage (+1V) on my HP would have damaged it.

    I used the wrong adapter for probably 10 hrs. What damaging effect would it have on my computer or battery?

    If the laptop still works fine there shouldn’t be any problem.

  37. Richard says:

    Hello, I have a burned out LCD adapter(12V 4amps)for my PC. I used my toshiba power adaptor(15V 5amps) but it did not power my LCD. Does it means the toshiba adaptor fried my LCD? I did not put the adapter not even a minute.

  38. Dajan says:

    Hi, my power adapter for dell inspiron 1520 stopped working..so i bought trust adapter as a replacment.
    Laptop: 19.5 [V] 3.5/4.9 [A]
    New trust adapter: 19.5[V] 6[A]..
    On boot windows is suggesting me that laptop is underpowerd and performances are bad. I can adjust voltage on adapter. Is it safe to go with higher voltage. Or to go with lower voltage. I do not get it, old adapter had less power(90W) new one 120W. How the hell is laptop underpowerd. Is there solution, and that is not to buy manufacturer adapter. Thanks

  39. Repair Man says:

    Dajan,

    Hi, my power adapter for dell inspiron 1520 stopped working..so i bought trust adapter as a replacment.
    Laptop: 19.5 [V] 3.5/4.9 [A]
    New trust adapter: 19.5[V] 6[A]..
    On boot windows is suggesting me that laptop is underpowerd and performances are bad. I can adjust voltage on adapter. Is it safe to go with higher voltage. Or to go with lower voltage. I do not get it, old adapter had less power(90W) new one 120W.

    I don’t really trust all these multi-voltage-amperage adapters. Apparently, your laptop doesn’t like it either because the adapter is not putting out what it says on the label. Do not increase the voltage. If your laptop requires 19.5V, you should give it 19.5V. Higher voltage can damage the laptop.
    I would suggest buying an original Dell adapter.

  40. tikaku says:

    Please tell me how to open tha casing of the AC/DC power Adapter… I have found the case that my adapter has a problem in AC adapter cable and adapter plug. So the cable component has to be replace.. But I do not know to open it, it is because there is no screw or hole for assembly the casing…
    Thank you very much for your information

    Tikaku

  41. Repair Man says:

    tikaku,

    Please tell me how to open tha casing of the AC/DC power Adapter… I have found the case that my adapter has a problem in AC adapter cable and adapter plug. So the cable component has to be replace.. But I do not know to open it, it is because there is no screw or hole for assembly the casing…

    The AC adapter is sealed and not repairable. You’ll have to purchase a new one. They are not expensive.

  42. Dia says:

    I have a dell inspiron laptop. The battery is failing (no longer receiving energy) and my kids broke the AC/DC adapter at the adapter end, which fits into the laptop. I tried to use electric tape to elongate the life, but tape is no longer holding. I’ve cut the black plastic covering and trimmed the silver wires, yet, there is not enough silver wire to stretch to the adapter end. Shall I replace the adapter end (and cut through the wires covered inside the white plastic, under the exposed silver wires) AND connect the new adapter to the exposed wires OR shall I purchase a universal AC/DC power supply until I can afford to buy a new battery? Please assist me! Thank you for your consideration.

  43. Repair Man says:

    Dia,

    Shall I replace the adapter end (and cut through the wires covered inside the white plastic, under the exposed silver wires) AND connect the new adapter to the exposed wires OR shall I purchase a universal AC/DC power supply until I can afford to buy a new battery?

    I would suggest replacing the broken AC adapter with an original Dell adapter. Stay away for universal adapters.

    My friend had a similar problem with his Dell Vostro 1500 laptop. The adapter tip broke off and instead of buying a new adapter he “fixed” the old one. After the fix the laptop was getting power but stopped charging the battery. The problem was fixed as soon as he replaced the “fixed” adapter with a brand new one.

  44. Dia says:

    Thank you. I understand. My battery may indeed still be usable! I appreciate your advice and keeping my fingers crossed! THank you, again!

  45. Trey says:

    I purchased a universal power supply and the end I need they did not have. So I cut off the end of my old one to put on the new one, but there is a blue wire in the middle of the new power supply. How do I make this work. Also there is no blue wire in the old power supply.

  46. Repair Man says:

    Trey,

    I purchased a universal power supply and the end I need they did not have.

    To be honest, I never trusted universal adapters. You never know if they work fine for your laptop.

    How do I make this work.

    Buy a factory replacement adapter.

  47. Billy says:

    I bought a replacement plug for my adapter and cut off the broken plug from my adapter. I am now ready to solder the replacement on but am unsure of which wire goes where. There are two wires, one black and one white. Could you please tell me which goes where? The laptop is a HP Pavillion DV1000.

    thanks in advance for your help.

  48. Russ says:

    I checked the voltage output of my power adapter [toshiba 19V 6.3amp] and it indicated 48Volts. I am currently looking at replacing this adapter with a new one [$45.00 deleivered to my house]. This adapter has allowed me to continue working with the computer by charging the battery. I then can use the computer on battery power. It gave me a lot of the same symptoms as the failure of the power jack on the motherboard (which i re-soldered 2 years ago). I am just trying to confirm that the output is really 48 volts …. i find it hard to believe.

  49. russ says:

    Ok,

    So I tested the voltmeter, it was giving me over double the correct voltage…. perhaps back to resoldering and a new battery.

  50. Repair Man says:

    Billy,

    I bought a replacement plug for my adapter and cut off the broken plug from my adapter. I am now ready to solder the replacement on but am unsure of which wire goes where. There are two wires, one black and one white. Could you please tell me which goes where? The laptop is a HP Pavillion DV1000.

    I don’t know, all adapters are different. You can test them with a voltmeter. Find out which one is “+” and which one is “-“.
    After that take a look at the AC adapter and look for the diagram. Find out if the “+” is inside or outside the plug.

  51. Repair Man says:

    Russ,

    I checked the voltage output of my power adapter [toshiba 19V 6.3amp] and it indicated 48Volts.

    I’ve seen hundreds of failed Toshiba adapter but never like yours. 48Volts! Are you sure that you measuring it correctly?
    If your laptop requires 19 Volts, I wouldn’t plug this adapter even when the laptop is off. You can damage the motherboard.
    Replace the adapter ASAP and do not use the laptop until then.

  52. Keri says:

    If you have an AC/DC can you replace with just an AC adapter?

  53. Repair Man says:

    Keri,

    If you have an AC/DC can you replace with just an AC adapter?

    What? What do you mean just AC adapter?

  54. Ken says:

    Please tell me how I can tell whether the problem I’m having is a bad DC adapter plug or a bad DC power jack (on motherboard). The problem is that pushing the DC plug in does not always create a connection. It has to be wiggled and maneuvered for some time before a connection is established. Thanks for your help! Ken

  55. shashi says:

    Please tell me how to open tha casing of the AC/DC power Adapter… I have found the case that my adapter has a problem in AC adapter cable and adapter plug. So the cable component has to be replace.. But I do not know to open it, it is because there is no screw or hole for assembly the casing…
    Thank you very much for your information

    Tikaku

  56. Repair Man says:

    shashi,

    Please tell me how to open tha casing of the AC/DC power Adapter… I have found the case that my adapter has a problem in AC adapter cable and adapter plug. So the cable component has to be replace.. But I do not know to open it, it is because there is no screw or hole for assembly the casing…

    Not sure if you can open the power adapter case without damaging it. The case is sealed and not supposed to be disassembled.
    I guess you’ll have to look for a new adapter. They are cheap on eBay.

  57. Joe says:

    so i lost my ac adapter. an old one i found outputs 19v, 3.95A while my laptop requires 19v, 3.42A. so it seems like it would work, but i read from other places online to make sure the polarity is the same. i couldnt find my laptops polarity anywhere, online or printed on the laptop. is there a way to find out the polarity, or is this not necessary, since you dont seem to mention it in your article?

  58. Repair Man says:

    Joe,

    i lost my ac adapter. an old one i found outputs 19v, 3.95A while my laptop requires 19v, 3.42A. so it seems like it would work

    Yes, this adapter should work fine.

    but i read from other places online to make sure the polarity is the same.

    Yes, it’s very important but from my experience most adapters have the same polarity. “+” inside the barrel and “-” on the outside of the barrel.

    is there a way to find out the polarity, or is this not necessary, since you dont seem to mention it in your article?

    Usually it’s printed on the adapter. There should be a diagram which shows the polarity. Let me find a picture and if I get one, I’ll post the link.

  59. Jay says:

    I have an External Hard Drive (EHD) that powers up and am able to hear it spinning. It seems normal by the sound.

    Problem: After trying four different computers and trying four different data cables none of the computers can recognize the EHD.

    Question: Could the AC Adapter be the problem?
    I tested the output of the adapter with a Fluke 73 and it indicates 12.10 volts as it should according to the specs plate on the adapter.
    However, in testing the amperage output, which is supposed to be 1.5A, the meter display does not show a steady output. Instead the digital display goes from 0 to up to a maximum of approx. 0.8 amps and flashing various other output readings in fractions of a second but never just a steady reading.
    I’ve tested other random adapters lying around and none have that type of behavior. They just give a steady amperage reading, usually 50% or higher than that written on the plate.

    Is it possible that this adapter is able to power up the EHD and sound as though it is functioning properly yet at the same time outputting defective, oscillating amperage and in turn cause an unreliable electrical signal to the computer disabling the computer’s ability to “see” the EHD?

    I tried an Universal adapter that tested at 12 volts and displays 2.95 amp output. The EHD begins to power up then shuts down and continues to repeat that cycle, never steadily running. Wonder if the EHD has a “sort of circuit breaker” built in that works like a heat sensitive circuit breaker.
    Normally devices restrict the amperage flow by what they actually use to run.

    The simple answer is to buy another adapter, but is that really the problem?

    Thanks, Jay

  60. Xer0 says:

    Hello. Is there an answer for Jay’s question? (the last one)
    I have a problem with a laptops power too. The voltage is good but the amperage reading is very erratic and I would like to know if this is a clear indicator that the brick has had it’s day. I am sure it is but would like confirmation before buying a new adaptor as it could be a loose dc socket but I think I have fixed that. I was getting it to boot sometimes for a few seconds when I was holding the jack in the socket a certain way but not very often, so could be getting deceived if the current is maybe staying steady for a few seconds. Surely the amps reading should not be jumping about like mad when it’s not under load eh? Like Jay said aswell, I tried another adaptor and the amps seemed steady enough, although very low but surely that is because there is nothing drawing power from the brick, correct?

    Thank you for any help.

  61. Repair Man says:

    Xer0,

    I have a problem with a laptops power too. The voltage is good but the amperage reading is very erratic and I would like to know if this is a clear indicator that the brick has had it’s day.

    How to you test the amperage? I don’t think you can do good readings until the adapter is loaded.

  62. Xer0 says:

    That’s what I thought. I tried it the same way as testing the voltage with a multimeter but with the amps setting. I tried another adaptor again and it actually goes to zero amps because there is no load, so it is very strange how I am getting that erratic readings with the suspected broken one. It must be knacked. Even though, I would like to know why it does that if anyone knows? The readings were jumping very fast to different values from anywhere between 0.something all the way up to 3.something amps. Very strange.

  63. sabby_rm says:

    Hello,
    I have a power problem with my samsung M50 laptop. I can only get it to start with the battery installed and on AC power. pwer only lasts about 10 minutes before it drains. If I leave it off the battery charges ( led light turns from yellow to blue ) and I can re-boot again. I know I probably need a new battery as it is the original and I’ve had the laptop for 4 years. However I cannot boot up on AC power alone… led light is blue when off ( with Battery out) and plugged into mains when I turn it on it starts to boot up gets past the bios screen to windows logo then shuts off… led light turns yellow then back to blue.
    I believe not all laptops will start on ac alone without the battery installed however I check with samsung and mine should. took it into a harvey norman and they checked with another ac charger and the same thing happened .. obviously something internal. I have tried several things I have read in blogs.
    – wiggling the power input jack when starting up.
    – checked the pins and plugs on ac jack and input to laptop
    – plugging into several different power mains directly
    – calibrating the battery
    – resetting buy holding the power button down for 1 minute with all accessories removed ie cd drive,
    Any idea’s or help is much appreciated.
    Thanks in advance

  64. manuell says:

    I use a little screwdriver I put the end on the midle of the power union.Make a little pouch and make his in all the side and thats it you can’t open them(push this first on the plg face side.

  65. steve says:

    My daughter’s Gateway MT6707 has a power problem. The original dc jack area had smoke coming from it. I did not see any signs of damage. I replaced the jack with a radio shack brand. I read a short even now that I replaced the jack. I have unplugged the fan, dvd drive and wi-fi module but the short is still there. Am I on the right track for troubleshooting this problem? I’m about to the point of letting someone with the right equipment have at it to repair it.

  66. stacey says:

    i have a emachine d620 laptop dog chewed my charger so bought one of ebay its not working my old one is input 100-240v 1.5a 50-60hz output 19v 3.42a myy new one is 100-240v 1.8a 50-60 hz out put 19v 3.42a is it not working because of .5a any help wold be grateful im stressed

  67. Repair Man says:

    stacey,

    i have a emachine d620 laptop dog chewed my charger so bought one of ebay its not working my old one is input 100-240v 1.5a 50-60hz output 19v 3.42a myy new one is 100-240v 1.8a 50-60 hz out put 19v 3.42a is it not working because of .5a

    The new AC adapter should work. The output 19V 3.42A is the same as on the original one, so it should be compatible.
    Your problem could be related to one of the following:
    1. The new AC adapter is not good. Try testing it with a voltmeter.
    2. The laptop motherboard was damaged by the damaged AC adapter.

    If the new AC adapter is good, here’s what you can try:
    1. Disconnect the adapter from the laptop.
    2. Remove the battery.
    3. Wait for a few minutes.
    4. Plug the AC adapter and try turning it on.

  68. Charles says:

    hello, I have a new dell xps that replaced and old one. I want to use the old power supply at home because I use the new one at work. The volts are the same at 19.5 but the amps on the old one is less. Is this a problem? thanks

  69. Repair Man says:

    Charles,

    I have a new dell xps that replaced and old one. I want to use the old power supply at home because I use the new one at work. The volts are the same at 19.5 but the amps on the old one is less. Is this a problem?

    If the plug on the adapter has the same size, it should be fine.

  70. nancy says:

    my adapter is a 65wc-ac adapter computer and i need to know how to rest it so mycomputer quits saying plugged in not charging and it starts charging

  71. jide says:

    please can someone help me i have been trying to get an adapter with with the capacity of 17 volts or 16.8 volts with 2.0 ampaere can someone help me with the store or on how i can get the adapter

  72. Repair Man says:

    jide,

    i have been trying to get an adapter with with the capacity of 17 volts or 16.8 volts with 2.0 ampaere can someone help me with the store or on how i can get the adapter

    Do you still have the old adapter? Find the part number and google it. This way you can find the right replacement.

  73. Avi says:

    I have a Gateway Cx200X laptop. I was travelling and one day i noticed that it isnt getting any power (power light is off). I have checked that the adapter is working fine.

    What do I do now ? I am a novice with laptops, but willing to take the plunge and fix it if I can get some guidance. I searched this website for any details for steps one would follow for such symptoms. Any help would be highly appreciated.

    thank you,
    Avi

  74. Repair Man says:

    Avi,

    I have a Gateway Cx200X laptop. I was travelling and one day i noticed that it isnt getting any power (power light is off). I have checked that the adapter is working fine.

    How do you know the adapter is good? Did you test it with another laptop or used a voltmeter?

    If the adapter is good but power LED doesn’t light up, there could be a problem with the DC jack.
    It’s necessary to disassemble the laptop and take a closer look at the jack. If the jack is loose or damaged it has to be resoldered or replaced.

  75. chelsea says:

    my ac dc adapter just stopped working for my dell inspiron 1545 how can i tell if the ac part needs to be replaced or if the plug in needs to be replaced?

  76. Repair Man says:

    chelsea,

    my ac dc adapter just stopped working for my dell inspiron 1545 how can i tell if the ac part needs to be replaced or if the plug in needs to be replaced?

    It’s hard to tell without testing even for an experienced tech.

    There should be a green light on the AC adapter when it’s plugged into the wall. If the green light is off, the adapter is dead.
    Also, you can test your AC adapter with a voltmeter. If it outputs correct voltage, most likely the adapter is good.

  77. Joe says:

    Hey, I’ve sifted through all of these comments and could not find an answer:

    I’d like to use an HP adapter on a Dell Inspiron 6400:
    Dell’s original adapter
    19V 3.34A
    Hp’s adapter:
    18.5V 3.5A

    I have no need to charge the batter on the Dell; my main concern is whether using the power adapter could potentially be damaged by using it in the Dell. The Dell turns on with the HP adapter plugged in, but I don’t want to run it if it could damage my only adapter (I use the HP laptop normally).

    Thanks.

  78. Dave says:

    what should the resistance between positive and negative output plug in a targus toshibia power adapter. Output is 15-24V@90W max

  79. cad says:

    i have a problem my gateway mt6707 laptop will not start or charge the battery nothing will come on.i checked the adapter and its working and the dc jack is working what could be the problem ? need help plz!

  80. Repair Man says:

    Joe,

    my main concern is whether using the power adapter could potentially be damaged by using it in the Dell. The Dell turns on with the HP adapter plugged in, but I don’t want to run it if it could damage my only adapter (I use the HP laptop normally).

    If it’s same type of connector (with same polarity), probably you can use HP adapter on Dell laptop. The voltage is almost the same and higher amperage shouldn’t cause any problem. This is my opinion.

  81. Repair Man says:

    Dave,

    what should the resistance between positive and negative output plug in a targus toshibia power adapter. Output is 15-24V@90W max

    Targus is not Toshiba AC adapter. I would suggest using original factory adapter instead of third party adapters.
    Sorry, cannot answer your question.

  82. Repair Man says:

    cad,

    i have a problem my gateway mt6707 laptop will not start or charge the battery nothing will come on.i checked the adapter and its working and the dc jack is working what could be the problem ?

    How do you know the DC jack is working? Did you remove the motherboard and tested voltage on the jack?
    If it’s not bad AC adapter or jack, it must be motherboard problem. Sorry cannot help here, I’m not fixing motherboards on the component level.

  83. cad says:

    yes i Did remove the motherboard and tested the voltage on the jack. thanks i guest am going to have to buy a motherboard but first sen it to a repair shop

  84. Repair Man says:

    cad,

    yes i Did remove the motherboard and tested the voltage on the jack. thanks i guest am going to have to buy a motherboard but first sen it to a repair shop

    Probably the laptop not worth fixing.
    There are no new motherboards on the market. Most of them are refurbished AND expensive.
    Just put your money into a new laptop.

  85. janet says:

    My adapter output is 19v but on the voltmeter it reads 9v do I need to replace it

  86. Repair Man says:

    janet,

    My adapter output is 19v but on the voltmeter it reads 9v do I need to replace it

    Normally, if your AC adapter rated 19V, the output would be very close to 19V.
    9v is not normal. I think you need to replace it with a new one.

  87. jester says:

    hello.. i have a problem with my laptop.. if i going to plug the adapter without the battery it wont power on.. but if i put the battery it has a power and it is charging.. and the indicators say “AC power source (charging).. can u pls help me about this problem.. thanks a lot..

  88. Kris Kendall says:

    On occassion, my toshiba ac/dc power adapter gets smoking hot.
    What’s up please.

  89. David says:

    Hi,
    I have a Gateway ADP-65HB BB adapter, and when I plug it in, its output reads the right voltage, but then it immediately begins to drop until it reaches zero volts within 10 seconds or so. You can easily see the power led on the adapter slowly dimming out, until it’s completely dark. Now, this is totally silly, I know, but I opened the sealed adapter case, in hoping to find an obvious damage on some easily replaceable component, but didn’t notice anything strange. Yet, I don’t have the knowledge required, so I don’t know what to look next. Could you please help me?

    Much Thanks,

    David

  90. Repair Man says:

    David,

    I have a Gateway ADP-65HB BB adapter, and when I plug it in, its output reads the right voltage, but then it immediately begins to drop until it reaches zero volts within 10 seconds or so. You can easily see the power led on the adapter slowly dimming out, until it’s completely dark. Now, this is totally silly, I know, but I opened the sealed adapter case, in hoping to find an obvious damage on some easily replaceable component, but didn’t notice anything strange. Yet, I don’t have the knowledge required, so I don’t know what to look next.

    Just buy a new adapter, it shouldn’t be very expensive.

  91. dave says:

    Hello… just wanna ask… i got my first laptop the toshiba L505… the problem was… I’m so confused on its power input… like the adapter above(image above) it said… input 100v-240v and the another one was the PSE info that said AC 100V 1.5a 50-60Hz… pls help im so confused… I’m still using power transformer to insure i plug it in 100v… I’m from philippines and the power voltage was 220V… the laptop was from japan and japan has 110v power voltage… pls help..
    thanks you in advance….

  92. salah says:

    my toshiba laptop (tablet edition)whn i start pci express error,how i can solved problem.

  93. Ken says:

    Sony labtop adapter die. It output 19.5V draw 3.9 A total of 76W
    Good toshiba labtop adapter. Output 15V 5A = 75W

    Will it be OK to do following:
    Replace it with my old Toshiba labtop adapter with splice Sony head to Toshiba?

    If I do not use CD all the time?

  94. Repair Man says:

    Ken,

    Sony labtop adapter die. It output 19.5V draw 3.9 A total of 76W
    Good toshiba labtop adapter. Output 15V 5A = 75W

    Will it be OK to do following:
    Replace it with my old Toshiba labtop adapter with splice Sony head to Toshiba?

    Don’t do it. You can (and most likely will) damage the motherboard.
    You’ll have to fund a new adapter with correct voltage.

  95. Repair Man says:

    salah,

    my toshiba laptop (tablet edition)whn i start pci express error,how i can solved problem.

    What if you remove the wireless card? Does it still give you the same error?

  96. Repair Man says:

    dave,

    i got my first laptop the toshiba L505… the problem was… I’m so confused on its power input… like the adapter above(image above) it said… input 100v-240v and the another one was the PSE info that said AC 100V 1.5a 50-60Hz… pls help im so confused… I’m still using power transformer to insure i plug it in 100v… I’m from philippines and the power voltage was 220V… the laptop was from japan and japan has 110v power voltage… pls help..

    Usually laptop AC adapters should work fine with 100v-240v AC if it says input 100v-240v.

  97. tzeing says:

    May i know what the input power rating of a laptop adapters? 100-240V input voltage AC is mentioned, but how much is the current rating? Example, 100Vac input, how much is current input rating? 240Vac input, how much is current rating? 1.5A mentioned at the adapter is for which input voltage rating?

  98. Repair Man says:

    tzeing,

    May i know what the input power rating of a laptop adapters? 100-240V input voltage AC is mentioned, but how much is the current rating? Example, 100Vac input, how much is current input rating? 240Vac input, how much is current rating? 1.5A mentioned at the adapter is for which input voltage rating?

    I think so.
    I’m looking at a generic AC adapter I have on my bench and it says:
    INPUT: 100-240V ~ 1.5A 50/60Hz
    OUTPUT: 18.5V – 3.5A

    1.5A for input.

  99. Joseph says:

    My power adaptor for an acer aspire 5536 laptop (output 19V 3.42A) is basically dead now (i.e. only funtions when the wire is in the correct position.

    I have an adaptor from an older acer laptop, with the following output spec: 19V 4.74A.

    What would the reprecussions of using that adaptor be?

  100. Repair Man says:

    Josep,

    My power adaptor for an acer aspire 5536 laptop (output 19V 3.42A) is basically dead now (i.e. only funtions when the wire is in the correct position.

    I have an adaptor from an older acer laptop, with the following output spec: 19V 4.74A.

    If the old adapter has same type of plug and polarity, you can use this adapter.
    Most likely the plug is the same and I’m pretty sure the polarity is the same.

  101. Joseph says:

    Thanks, all seems to be working fine so far

  102. Karin says:

    Just the wire right at the base of the tip that plugs into my HP Inspiron laptop has broken. Can I fix or replace just this tip?

    I can see that it is a center wire (copper, I think) wrapped in plastic insulation & then surrounded with steal wire & covered w/ the outer plastic sheath– kind of like coaxial cable. Coax ends can be replaced, so it seems like there should be a way to fix this too. How can I do it?

  103. David says:

    Interesting. I have found plenty of adapters (50/50) that will supply the correct voltage, however, when under load, do not supply the correct current…would be super handy to have a tester that could test that without having to grab a “known good” adapter to test the clients unit with

  104. Rob says:

    Hello,
    I have a 4 pin AC Adapter from a Western Digital Combo external hard drive which is manufactured by Part II Research. The model # is AC-005W. Input: 100-240V, 1.A, 50/60 Hz. Output: 5V/2.2A, 12V/1.5A.
    This switching power supply has failed and is no longer manufactured. There are several similar 5V/12V switching adapters on Ebay but none that match the amperage output of the original unit. The majority of them are listed as input 100-240V .6A and output 5V/2A, 12V/2A. Is it safe to use one of these adapters?
    Thanks

  105. Repair Man says:

    Rob,

    I have a 4 pin AC Adapter from a Western Digital Combo external hard drive which is manufactured by Part II Research. The model # is AC-005W. Input: 100-240V, 1.A, 50/60 Hz. Output: 5V/2.2A, 12V/1.5A.
    This switching power supply has failed and is no longer manufactured. There are several similar 5V/12V switching adapters on Ebay but none that match the amperage output of the original unit. The majority of them are listed as input 100-240V .6A and output 5V/2A, 12V/2A. Is it safe to use one of these adapters?

    If new adapters have exactly the same connector (4 pins) designed for WD hard drives, I think they are safe for use.
    The original output 5V/2.2A, 12V/1.5A is very similar to new output 5V/2A, 12V/2A.

  106. Rob says:

    Thank you for taking the time to respond to my question.
    I can only find a replacement adapter with 5V/1.5A, 12V/1.5A.
    I’ll give that one a shot.
    Thanks again.

  107. ANEESH M.N says:

    HOW TO TEST OR REPAIR POWER ADAPTERS

  108. Tom says:

    Sir,
    I am looking for a “AC 100V-240V- Output 5V 1.5A Power Supply for a “DTA” (Digital Transport Adapter) for my television. I have the adapter but lost the power supply cord. Thank you for any assistance.

    Tom

  109. kevin fletcher says:

    Hi my netbooks broken power supply states output 12v 3amp ,i have another power supply output 12v 2 amp (same size jack plug) is it safe to use this?

  110. Wayne says:

    Thank you repair man, your post was exactly what I was looking for. It was the first link I bacause was checking if I needed the same amps because I found a power supply with the volts but higher amps. Also, your page is clear, simple and informative.
    Regards,
    Wayne

  111. ttnet basvuru says:

    i fixed adapter, thank you laptopparts101

  112. Anna M says:

    @kevin fletcher
    can i buy your 12v 2amp charger? :) we need the exact thing but cant find one. besides, plugging in to a lower ampere will only destroy your device

  113. Subho says:

    Hello,
    I have a Sony S series vpcs115fw
    On it’s bottom it’s written 19.5V DC
    On the original power brick output is 19.5V 4.7A
    I calculated this is a 90W power brick.
    I bought a secondary 90W universal power brick, but only noticed that its rating is 19V 4.74A
    Now I’m wondering whether the difference is small enough to work with my laptop or if it will kill it.
    Sure would love a second opinion.
    Thanks

  114. mike says:

    hey guys, im wondering if my charger is working or not since i changed the battery and it will only say “pluged in, not charging” sooo anoying, do you guys know how to check on that?

  115. DTimms says:

    Been looking up replacement parts for my adapter, only to find that all the recommended ones are 0.5 volts higher in specification. Everything else is fine, but, the primary difference is the voltage.
    18.5V to 19.0V
    Want to make sure before I buy.

  116. Tom Bray says:

    Can I use a 19.5 VDC AC adapter on my Sony VAIO that says it wants to see 16 VDC? Will that small difference damage the laptop?

  117. Repair Man says:

    @ Tom Bray,

    Can I use a 19.5 VDC AC adapter on my Sony VAIO that says it wants to see 16 VDC? Will that small difference damage the laptop?

    No you cannot. It can damage the motherboard. Use 19.5V adapter.

  118. Nicole says:

    I have a Lenovo N500 series.
    Original power cord adapter is
    INPUT 100-240V~14a 50-60hz
    OUTPUT 19V 3.42A

    purchased replacement but didn’t look closely enough and the INPUT is the same but OUTPUT IS 19V 4.74A (not the 3.42)
    Is this safe to use or could it cause issues? I have read very conflicting information and since it is an IBM product they no longer carry or produce the exact replacement part with the same output amp.

  119. andre watson says:

    i want to purchase an ac adapter for my laptop which is 19 volt
    output 6.32 a and 120 watt. is it bad if i pyrchase a 19 volt,120 watt ac adapter carrying 6.41 output

  120. Repair Man says:

    @ andre watson,

    i want to purchase an ac adapter for my laptop which is 19 volt
    output 6.32 a and 120 watt. is it bad if i purchase a 19 volt,120 watt ac adapter carrying 6.41 output

    You should be fine with 19v-6.41A adapter.

  121. Repair Man says:

    @ Nicole,

    purchased replacement but didn’t look closely enough and the INPUT is the same but OUTPUT IS 19V 4.74A (not the 3.42)
    Is this safe to use or could it cause issues?

    It’s save to use 19v-4.74A adapter.

  122. Bob Sherman says:

    I have a 6.32 amp brick for my laptop – my replacement brick is only 5 amps. Will this work?

  123. Nick says:

    I have a netbook and a laptop. The adapters are clearly different but my question is regarding the part that plugs into the brick and then the wall. They both look the same but have different numbers on them. Does it matter which one I use?

  124. Repair Man says:

    @ Nick,

    I have a netbook and a laptop. The adapters are clearly different but my question is regarding the part that plugs into the brick and then the wall. They both look the same but have different numbers on them. Does it matter which one I use?

    Are you asking about the power cord? If both power cords have same type of connector, you can use either one.

  125. Repair Man says:

    @ Bob Sherman,

    I have a 6.32 amp brick for my laptop – my replacement brick is only 5 amps. Will this work?

    Probably it will work but it might take more time to charge the battery. Or the battery will not charge at all.
    Some people say that using underpowered AC adapter might damage the motherboard but I don’t know for sure.
    I would use 6.32A adapter.
    By the way, check label on the bottom of your laptop. Does it require a 6.32A adapter?

  126. MRSA says:

    Hi!My cousin gave me his laptop because he bought a new one. Though the problem is that, the battery and the laptop adapter was borrowed by his friend a few weeks back.

    Now, I’m planning to buy a new battery and a new adapter. But the problem is this, I don’t have a clue what type of laptop adapter and battery to get. It’s an Asus A8LE/Z99 laptop. Underneath the laptop. this is what I found +19V 3.42A 65W

    TIA! :)

  127. Repair Man says:

    @ MRSA,

    I’m planning to buy a new battery and a new adapter. But the problem is this, I don’t have a clue what type of laptop adapter and battery to get. It’s an Asus A8LE/Z99 laptop. Underneath the laptop. this is what I found +19V 3.42A 65W

    Just google “Asus A8LE/Z99 adapter” and you’ll find it.
    Also, new adapters for Asus Z99 laptops available on eBay. There shouldn’t be any problem finding it.

  128. MRSA says:

    thanks mr Repair Man! :)

  129. Robert says:

    In my Compaq presario V4000 laptop there used to be shut down ater 10-15 mts use. Batter is old and takes 4% charge, but I use the laptop with AC adapter. The problem was diagnosed to fan and was changed but the problem persists.When it works, if I click on the power meter it says AC power on and batter 4% charge. The laptop should run with AC adapter and as such is the problem with the adapter?

  130. LoveSiee says:

    Hello there ! Thank u YOU ! Such an informative blog ! I wonder what is actually happening, which part is damaged when this universal adapter is stop working, no explosive sound inside the adapter and the laptop shut off, because the volt of the universal adapter is 19V, needed 19.5V. Could u explain it for me, im not a pro and had no idea whats inside the adapter, but I couldnt help myself until I understand & learn. Annnd.. Is it logic to have switchable voltage??? I mean this universal adapter can switch from 12V to 25V 0__o???

  131. Eytan says:

    Hi,

    First of all – your tutorial is excellent! informative, clear and easy to read and understand.

    There’s one thing I don’t understand: When buying a new adapter, assuming the output voltage is identical (to the previous, now-dead, adapter) – how much higher can the amperage be?

    I have a Dell Mini 10 and the second charger just died. The specs are: Input 100-240V, Output 19V, 1.58A, 30W.

    Can I use a universal charger using the following setting: DC output 19V 5A ? (Between the two values is an odd ‘sign’ – a solid line, with a dotted line underneath it)

    The complete settings of the (Universal AC and car) adapter are as follows:

    AC Input: 100-240V~ 1.8A 50/60Hz
    DC Input: 12V 15A
    DC Output: 12V – 5A Max
    15V – 5A Max
    16V – 5A Max
    18V – 5A Max
    19V – 5A Max
    20V – 4.5A Max
    24V – 4.5A Max

    USB Port: 5V – 1500mA Max

    Thanks in advance for all your help!

  132. Scott says:

    Hi,

    When replacing a laptop power supply, assuming the voltage is identical (19V) – how much higher can the amperage be?
    The old adapter’s specs are: 19V, 1.58A, 30w
    the new “universal” adapter, using the 19V setting, will supply “5A max”

    can I use the adapter? what does “max amperage” mean?

    Thanks!

  133. seta says:

    Hi,
    you kind of answered this question in an earlier comment/reply, but I wanted to clarify.
    I just bought a Samsung 700Z5B from the US, but I live in France.
    I wanted to switch the power cable from my old laptop (Thinkpad T40)with my new laptops, just so I can plug it into the wall without using a plug adapter. Is that ok? it is the same 3-hole type that plugs into the actual AC adapter.
    thanks

  134. Dennis says:

    The original adapter for HP DV4-2160US is 18.5V, 3.5A, 65W, positive polarity (output). I have two other extra HP AC adapters. Which one I can use:

    1) 19V , 4.7A, 90W, Positive polarity
    2) 18.5V, 6.5A, 120W, Positive polarity (for 17″ laptop)

    Thanks,

  135. Repair Man says:

    @ Robert,

    In my Compaq presario V4000 laptop there used to be shut down ater 10-15 mts use. Batter is old and takes 4% charge, but I use the laptop with AC adapter. The problem was diagnosed to fan and was changed but the problem persists.When it works, if I click on the power meter it says AC power on and batter 4% charge. The laptop should run with AC adapter and as such is the problem with the adapter?

    I think your problem is not related to the AC adapter. You said the laptop shuts down after 10-15 minutes and this sounds more like heat related issue.
    Take a look at the cooling fan while the laptop is running. Can you see the cooling fan spinning? Does it work at all?
    You said the fan was replaced but maybe they forgot to connect it?

  136. Repair Man says:

    @ LoveSiee,

    Is it logic to have switchable voltage??? I mean this universal adapter can switch from 12V to 25V 0__o???

    Yes, the logic board inside the universal AC adapter has switchable voltage. There should be a switch on the AC adapter where you can set correct voltage.

    Could u explain it for me, im not a pro and had no idea whats inside the adapter, but I couldnt help myself until I understand & learn

    There is a small transformer inside the AC adapter which converts hight voltage AC power into low voltage DC power. Normally you don’t repair failed AC adapter, you replace it with a new one.

  137. Repair Man says:

    @ Eytan,

    There’s one thing I don’t understand: When buying a new adapter, assuming the output voltage is identical (to the previous, now-dead, adapter) – how much higher can the amperage be?

    There is no limit. It just has to be the same or higher.
    For example, your laptop required 19v-1.58A adapter. You can use 19v-3.95A, 19v-4.74v, 19v-8A, etc…
    You just have to make sure the power plug shaped the same as the original one, the polarity on the plug is the same (for example + inside and – outside) and the output voltage is the same.

    Can I use a universal charger using the following setting: DC output 19V 5A ?

    Technically, yes. But I personally don’t like and recommend universal adapters.
    I would suggest buying the original one even though it’s more expensive.

  138. Repair Man says:

    @ Scott,

    When replacing a laptop power supply, assuming the voltage is identical (19V) – how much higher can the amperage be?

    As I mentioned in the previous comment, there is no limit. It must be the same or higher, that’s it.

  139. Repair Man says:

    @ seta,

    I wanted to switch the power cable from my old laptop (Thinkpad T40)with my new laptops, just so I can plug it into the wall without using a plug adapter. Is that ok?

    I cannot tell without looking at both adapters.
    Probably it’s OK to do under three conditions:
    1. Both AC adapter have similar connectors.
    2. Both AC adapter have identical voltage output and polarity on one adapter matches polarity on the other adapter (for example “+” inside the plug and “-” outside the plug).
    3. Amperage on the ThinkPad adapter is same or higher than required by Samsung laptop.

  140. Repair Man says:

    @ Dennis,

    The original adapter for HP DV4-2160US is 18.5V, 3.5A, 65W, positive polarity (output). I have two other extra HP AC adapters. Which one I can use:

    1) 19V , 4.7A, 90W, Positive polarity
    2) 18.5V, 6.5A, 120W, Positive polarity (for 17″ laptop)

    Some HP laptops can use both, 18,5V and 19V adapter. Take a look at the bottom sticker and see if both adapters mentioned on there.
    – if both 18.5V and 19V adapters mentioned on the laptop sticker, you can use both ( I assume both adapters have similar connectors).
    – if only one 18.5V adapter mentioned, use only 18.5V, 6.5A, 120W, Positive polarity (for 17″ laptop).

  141. brad says:

    Will a 3.42 amp charger stop charging my netbook that originally took a 1.58 amp charger,or will it overcharge? It clearly charges from dead much faster getting the battery warm, which I would guess like a car battery, can cause slightly more wear by rapid charging. but lead isn’t lithium so I don’t know!

    So I am unsure if I should unplug the charger when fully charged or leave plugged in. or get original specs charger of 1.58amp

    I simply have a drawer full of old laptop charges and now have two netbooks with NO chargers.

  142. Repair Man says:

    @ brad,

    Will a 3.42 amp charger stop charging my netbook that originally took a 1.58 amp charger,or will it overcharge?

    As long as voltage is the same, the laptop should charge normally with the 3.42A adapter.

    So I am unsure if I should unplug the charger when fully charged or leave plugged in. or get original specs charger of 1.58amp

    I think you should be fine with the 3.42A adapter.

    It’s like wall outlet. You have 120V~15A coming out of the socket. When you connect a TV which requires 120V~2A, it works normal isn’t it?

  143. Shyuan says:

    Hi,

    I have a laptop ASUS K53SV from USA. I wanna get a UK type power cord (without adapter as mine is very new) to replace the US type power cord. My laptop power adaptor shows the details as below:

    Model: ADP-120ZB BB
    Input: 100-240V ~ 2.0A 50-60Hz
    Output: 19V — 6.32A

    Which power cord should I get? Do I choose power cord which support 240V? And do I choose also Amp which is more than 2A or should be more than 6.32A?

    Hope you can help me with this. It’s urgent for me. :( Thanks!!

  144. Repair Man says:

    @ Shyuan,

    Which power cord should I get? Do I choose power cord which support 240V? And do I choose also Amp which is more than 2A or should be more than 6.32A?

    By the power cord you mean the actual cable between the wall outlet and your power brick, correct? I think any power cord can handle 240V~2A. Just make sure it has the same connector as the US cord.

    Also, instead of replacing the power cord, you can buy an All-in-One Travel Power Plug Adapter for US, UK, EU, AU ($3 from Amazon).
    You plug this adapter into UK socket and on the other side you have regular US connector.

  145. Shyuan says:

    Hi, thanks a lot for replying me. :D

    1) In fact, I already have a Travel Adapter (for global travellers visiting UK) with the info as below:

    Max 13A 250V

    I need to use my US laptop in UK for a long period, I am afraid that I shouldn’t use travel adaptor, hence I choose to change the power cord, is there such a thing?

    2) And besides, what if I insisted to change the power cord (yes, it is the “cable between the wall outlet and your power brick”, like you said)? I found UK power cords in some stores just now. They shown me UK power cord which can handle up to 240V with 5Amp. So with this power cord 240V 5A, it supposed to be able to work with my power brick requirement right?

    3) I also wanna ask, should I refer to the Amp in “Input: 100-240V ~ 2.0A 50-60Hz” or the Amp in “Output: 19V — 6.32A” when facing issue like this? By looking at your reply, I assumed that I should refer to the Amp in “Input” right? Correct me if I am wrong.

    Sorry for asking so many questions, I hope you could help me on these. Otherwise, it is totally okay with me if you can’t comment on them. :) Your help is much appreciated. Thank you.

  146. Repair Man says:

    @ Shyuan,

    They shown me UK power cord which can handle up to 240V with 5Amp. So with this power cord 240V 5A, it supposed to be able to work with my power brick requirement right?

    Yes, it should work fine. Your AC adapter input is 100-240V ~ 2.0A and the cable is 240V~5A. The power cable has higher ratings and that’s the way it should be.

    I also wanna ask, should I refer to the Amp in “Input: 100-240V ~ 2.0A 50-60Hz” or the Amp in “Output: 19V — 6.32A” when facing issue like this?

    For the power cable replacement you should refer to the input: 100-240V ~ 2.0A 50-60Hz.

  147. Ivan says:

    I would like to ask what may happen if for example my 90w power adaptor died and now I use a 60W one, the notebook seems to work, but can it damage the notebook?
    thx

  148. Repair Man says:

    @ Ivan,

    I would like to ask what may happen if for example my 90w power adaptor died and now I use a 60W one, the notebook seems to work, but can it damage the notebook?

    Take a look at the bottom of the notebook. There should be AC adapter voltage and amperage mentioned somewhere on the sticker. Something like 19V~3.42A
    Let me know requirements for your laptop.

  149. Ivan says:

    Take a look at the bottom of the notebook. There should be AC adapter voltage and amperage mentioned somewhere on the sticker. Something like 19V~3.42A
    Let me know requirements for your laptop.

    It’s 19V~4.74A

  150. Repair Man says:

    So, it does require a 90W power adapter (19*4.74=90).
    If you going to use the laptop with a 60W adapter you can face the following issues:
    – it’ll take a long time to charge the battery.
    – there is a possibility of damaging the motherboard. It’s not good for the motherboard to use underpowered AC adapter.

    Most likely you’ll be fine if you use the laptop from the 60W AC adapter with the battery removed. Also, it’s probably OK if you use the 60W AC adapter to charge the battery while the laptop is turned off.

    I would suggest buying the proper AC adapter.

  151. Ivan says:

    thank you very much for everything, I intend to buy one…

  152. Shyuan says:

    Hi,

    Thanks for your valuable information! I got it! :) Cheers

  153. LoveSiee says:

    Thank you so much Mr. Repair Man ! Appreciate ur help so much ! =)

  154. benj says:

    Hello ! I have laptop the AC adapter is origenally 18.5 volts 3.5 aperes is dead… i am using temporarely 18 volts 20 volts amperes, there”s no side effect in laptop? thanks….

  155. Big dog says:

    Hi repair man.

    I have been reading through you Q & A’s and you have said that when replacing the adapter the voltage must be the same, however the amperage can be equal to or more than the original adapter.

    You did not say what would happen if the amperage was lower. For example could you replace an Adapter with an output of 19v 6.32amps with one that produced 19v and 6.3amps?

    Or would doing this cause potential damage or problems with the laptop?

    Many thanks

  156. Repair Man says:

    @ benj,

    I have laptop the AC adapter is origenally 18.5 volts 3.5 aperes is dead… i am using temporarely 18 volts 20 volts amperes, there”s no side effect in laptop?

    Can you switch between 18 volts and 20 volts?
    I really don’t like adapter with multiple voltage output.

  157. Repair Man says:

    @ Big dog,

    You did not say what would happen if the amperage was lower. For example could you replace an Adapter with an output of 19v 6.32amps with one that produced 19v and 6.3amps?

    Using a 19v~6.3A adapter instead of 19V~6.32A? You should be fine.

  158. joey says:

    i’m using the huntkey adapter for my hp mini 1000 instead of using the proper hp adapter. my question is the hunt key adapter output 19v. but my battery 11v. it’s got any side effect. thanks

  159. Repair Man says:

    @ joey,

    i’m using the huntkey adapter for my hp mini 1000 instead of using the proper hp adapter. my question is the hunt key adapter output 19v. but my battery 11v. it’s got any side effect

    Do not look at the battery voltage.
    The most important is matching your new adapter voltage with the original adapter voltage. The motherboard will convert it into 11V as required by the battery.

  160. Bashara says:

    I have a 19v-3.95A adapter. Can i use 19v-3.42A?PLS i need an answer ASAP.tanx

  161. carlos says:

    Hello sir, I need a new charger for my laptop. It is 19v charger. On the other hand, I have some 15v charger from my old toshibas. Is there any way to mod my 15v charger into 19v charger?? Its OK if I have to prick my 15V charger apart. (i’ve done that several times). I will greatly appreciate if you send me a copy of your answer to my e-mail. Thank you in advance

  162. Repair Man says:

    @ Bashara,

    I have a 19v-3.95A adapter. Can i use 19v-3.42A?

    Most likely the laptop will work with 19v-3.42A. It might take longer to charge the battery but it will work.
    I wouldn’t recommend using it for a long time. It’s better to use the same adapter as the original one.
    Also, do not buy cheap third party and compatible adapters. Buy the original adapter.
    You can buy genuine 19v-3.95A adapter on eBay for about $15-20.

  163. Repair Man says:

    @ carlos,

    I need a new charger for my laptop. It is 19v charger. On the other hand, I have some 15v charger from my old toshibas. Is there any way to mod my 15v charger into 19v charger?

    You cannot do that. Laptop AC adapter not repairable and usually they are sealed units. Just buy a new adapter.
    I wouldn’t use the laptop with a 15V adapter. You can damage the motherboard.

  164. Tana says:

    I am looking at buying a new power adapter for my acer aspire laptop. It is giving me 2 options, the fixed U-tip or the fixed C-tip. What is the difference between the 2???

    Thanks

  165. Repair Man says:

    @ Tana,

    I am looking at buying a new power adapter for my acer aspire laptop. It is giving me 2 options, the fixed U-tip or the fixed C-tip. What is the difference between the 2

    What is your laptop model number? Acer Aspire ###?

  166. yve says:

    My toshiba use a 19v 3.74a adapter.It crapped out,I have a 19v 6a adapter,can I use that?

  167. Repair Man says:

    @ yve,

    My toshiba use a 19v 3.74a adapter.It crapped out,I have a 19v 6a adapter,can I use that?

    If your 19V~6A adapter has same plug type you can use it.

  168. yve says:

    yeah it has the same plug,so theres no issue with the amps,from 4.74 to 6?

  169. Repair Man says:

    @ yve,

    yeah it has the same plug,so theres no issue with the amps,from 4.74 to 6?

    No problem. The laptop will take as much as it needs.

  170. CG says:

    My original HP dv6 AC Adapter is:
    Input: 100-120V~50-60Hz 2.0A
    Output: 18.5V 6.5A

    My replacement AC Adapter is:
    Input: 100-120V~1.8A-0.6A 50/60MHz
    Output: 18.5V 3.5A

    Will my replacement AC Adapter damage my HP dv6 laptop? I’m concerned about the Output be half of the original Output. Thank you for the feedback in advance.

  171. Anun says:

    M using a IBM R52 laptop which takes the output of 16V,4.5A. My adaptar has got damaged somehow. And my batry is also not working. It gives 0 sec bakup. So it means it works directly. I have a old hp adapter of 18.5V,3.5A. So could I use it with my laptop via a connector??

  172. allen says:

    hello, my previous acer laptop adapter was 19 v. 3.42 a, but it damaged. so could i replace it using universal laptop adapter with 90w, 19v and 4.74? thank you.

  173. Eric says:

    My Dell inspiron Mini has a 19V, 1.58A adapter s it okay I I use a 20V, 3.25A ac adapter. Will it damage my mobo? Thanks.

  174. Bill says:

    Charging my Toshiba Satellite laptop has become a problem. Sometimes it takes a charge. Sometimes it doesn’t, for more than a moment or two. Does this likely indicate a fault within the laptop or is the adapter possibly at fault? I’m currently thinking of buying a replacement adapter just to try it out….but maybe adapters either work or don’t work? Thanks!

  175. julie says:

    hi mr repair man i am using a 19v 3.42a charger for my toshiba laptop but it damage is it possible to use a 19v 4.74a toshiba or will it damage my computer thank you julie

  176. frenchmal says:

    Hi ,

    on my laptop Brand ” Toshiba satellite A200 2BH ”
    the fuse on the motherboard seems to be blown…?
    the ac adaptator is on and work (tested)
    where do i find the main fuse on the motherboard?
    Do you have photo please

    Regards thank before

  177. Chitra says:

    for my Toshiba Satellite laptop (AC/DC adapter – 19V) can i use 20V adapter(AC/DC)

  178. RAJ says:

    Hello Sir,

    I have the AC adapter is originally 19 volt 3.42 AMP that is dead. I got a old thinkpad charger with 16 volt 4.5 amp . can i use for my laptop

  179. Chantelle says:

    Hi I have a Toshiba Satellite C850 laptop that my dog chewed the crap out of the charger for. I bought a universal charger that was supposed to be for all Toshiba laptops as well as a variety of other makes, but it blew my laptop’s motherboard up twice. Now my year warranty is up and I don’t want to blow it up again, so im not using the universal charger anymore. My friend has a Toshiba Satellite too but it’s a different model. The back of my laptop says it’s 19 volts and 3.42 amps and my friends charger says its output is 19 volts and 6.32 amps. Can I use her charger without risking any damage to my laptop? I already spent 80 dollars on a piece of crap universal charger that blew my laptop up.. I can’t a

  180. Prashant Sah says:

    HI, i have a Dell N4050 laptop. My adapter gives an o/p voltage of 19.90 volt when i checked it with a multimeter. Even though, it is not charging the battery (says plugged in, not charging). However, I can use my laptop with this adapter plugged in and battery taken out. I have tried the solutions given in youtube that suggests to uninstall the ACPI compliant battery method battery in device manager but it doesn’t work. I have two adapters damaged in 2 years and it’s frustrating to keep on buying new adapters again and again. HELP ME!!

  181. yhia says:

    hello dear repair man .. i hope its not too much bother .. i have question about Adapters ..
    my original Adapters is 19.5v and 4.62a
    i bought a high copy but its not the same its 19.5 and 3.62a
    and after that my touch pad went crazy ..
    so i try with other original adapter its 19v and 4.7a which is working perfectly with me but i’m worry about the different in Voltage between both my original one and the last one which is lower 19v and 19.5v
    i hope u can answer me soon .. thanks

  182. raj says:

    i want toshiba adapter

    Model: PA3822E-1AC3
    OUTPU: 19.V- 2.37A
    INPUT 100-240V-1.3A 50-60hZ

    If do you have pls send me u r contact details and price details

    thanks
    raj

  183. Arega says:

    i have c660 laptop satellite. my AC adapter is originally 19 volt 3.42 AMP that is dead. I know that the battery has died in it. It was going bad for some time and now it’s dead. when it turn it on the power light on for a second and then off. no display. if i try to power after the battery is dead, the laptop does not power ,it only gives a wink of the LEDS,within seconds trips off with an accompanying sound.
    please help, am still troubleshooting though.

  184. Donna Rautenstrauch says:

    I have a problem. I accidentally returned the little connector for the power cord to the store on an a universal power adapter I didn’t like and now it is gone. Where can I replace that for a HP Pavilion dv6700. ??
    I have sent for another adapter unit online but I don’t remember if that part came with the original computer or if it was part of the adapter.

  185. Xiao Bing says:

    Is it okay to use a 19V, 4.74A with a laptop that requires 19V, 3.95A? Thanks in advance! Looking for your all favourable reply.

  186. Ioana says:

    hello. i have a sony ac adapter 19.5V – it’s almost 3 years old. While plugged, the led is flickering. What could cause this? Should I consider changing it? thanks!

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