LCD screen cable
A laptop LCD cable also known as video cable, display cable or screen cable. This cable transfers data signal from the motherboard and video card to the LCD screen. Also, most video cables supply high voltage DC power to the screen inverter.
On the picture you can see a typical laptop video cable. The cable has three ends with three connectors. One end plugs into the connector on the back of the LCD screen, the second end plugs into the inverter board, the third end plugs into the connector on the motherboard or video card.
The top part of the cable runs inside the laptop display panel between the LCD screen and display cover.
The bottom part of the cable could be found either under the keyboard or keyboard bezel.
In order to remove and replace the LCD cable, it will be necessary to disassemble the whole laptop.
LCD CABLE RELATED PROBLEMS
1. The image on the screen appears normal until you move the display up or down. When you move the display, the images on the entire screen starts to flicker, disappear or change collors. As soon as you stop moving the display, the image gets back to normal.
2. The LCD screen lights up but there is no image at all. The entire screen is blank. An external monitor connected to the laptop VGA port works fine, there is no problems with the external video output at all.
3. Image on the entire LCD screen is garbled. An external monitor works fine.
In many cases the video cable failures are very similar to the LCD screen failures.
May 17th, 2010 at 8:56 am
Hi, i have a compaq laptop and i recently dropped it and cracked the screen on it. There is no way of seeing anything on the screen once i turn it on, i can jus see the backlight thru cracks on the screen, screen i basically black from all of the ink. I just purchased a VGA cable so i can use my hdtv as an external monitor. The problem is when i hook the cable up to the tv and the laptop, the tv is telling me that there is no signal. Can someone please give me advice on what to do?
April 25th, 2010 at 2:15 am
Hi I notice one more thing on different Nvidia drivers screen goes off on the battery and power cord every time i go to NVidia control panel and go to TAB ”Adjust image settings with preview” (Nvidia spinning logo in 3d) Like problem with 3d acceleration?? 2d works ok.
Right now i have default Nvidia drivers that comes with vista windows update and Logo TAB works OK and movie acceleration is OK but cant run any 3d game, its exiting to the desktop, but screen wont go blank. That isnt driver problem because before that happened i was updating Vga in every new release from Laptop2go site.
Thanks
April 24th, 2010 at 6:06 am
Hi , I have this odd problem with my Laptop ( Gateway P-6860FX)
After starting up fresh copy of windows everything works OK but after Instaling NVidia drivers screen after some time goes blank (no sound hdd working lite bit longer but goes off to)And its sometimes wihite, black and even light blue.. Nothing works, external monitor wont work either. But if I startup system with external monitor connected it works no problem, Laptop screen and external monitor, if I disconnect monitor, laptop goes blank again and nothing helps it freezes.And thats happening usually when i try startup game or open Nvidia control panel sometimes right after logon screen, but if external monitor is connected works perfect???
Safe mode works perfect too, on battery i can manage to run the game so I ordered yesterday new power supply, but today it happend on my battery too… but on battery it almost works ok.
I checked monitor connection, instal every posible vga driver reinstall windows few times xp vista 7 bios update nothing helps, It worked two years no problem, that happened when i was playing game screen start flickering, and after restart problem with blank screen occurred
Please help!! give me any Idea what could be wrong. I think its vga problem and if it is its very odd because it works perfect with additinal monitor???
April 23rd, 2010 at 12:56 pm
Daniel,
That’s probably normal. You see just a white screen because the backlight lamp is working but there is no data signal coming from the motherboard.
On some laptops, the LCD screen turns completely white as soon as you disconnect the video cable from the screen.
I guess your brother was able to see picture right after he dropped the laptop, but after you replaced the screen there is no picture on both (new and old cracked screen. Is my assumption correct?
There is a chance that you damaged the LCD cable while disconnecting it from the cracked screen. Did you pull by the wires? I guess you can try replacing the cable next.
If you using a known good LCD screen and video cable, but the screen is still white, it’s either bad connection between the cable and motherboard/LCD or motherboard failure.
April 23rd, 2010 at 12:48 pm
I forgot to mention that I tried to disconnect video cable from the screen = no change at all – only white backlight…
April 23rd, 2010 at 12:46 pm
Hi,
yes I reconnected video cable from the motherboard but without success. What is certainly strange is that my brother could see picture, but now I can’t see any…
April 23rd, 2010 at 12:41 pm
Daniel,
Yes, it’s possible but not a common failure. I’ve seen failure like that a few times.
By the way, have you tried reconnecting the LCD cable on the motherboard. Maybe the cable got disconnected slightly when you dropped the laptop. Just a guess.
April 23rd, 2010 at 12:14 pm
Hi,
thank you for your answers.
“Can you test the laptop with the old cracked screen” – I can see only white background, no picture. It is my brothers laptop and he just said that immediately after he cracked screen, he could see picture on some parts of the screen (which wasn’t cracked). However now I can’t see any picture at all, just white backlight.
So old screen and new screen behave same – white backlight only…
I heard that even external monitor works it could be still something cracked on the motherboard…is it right?
April 23rd, 2010 at 7:51 am
Dan,
Did you see any image on the undamaged part of the screen.
The description sounds like you damaged just the screen but the laptop itself should be OK.
Looks like the laptop is not getting data signal from the motherboard.
1. Make sure the LCD cable is plugged correctly into the new screen.
2. Did you purchase a compatible screen? Maybe your new screen is not compatible with the laptop OR requires a different LCD cable? Double check the LCD screen compatibility.
3. Can you test the laptop with the old cracked screen (I assume you still can get image on the undamaged part). If you can see image on the old screen but not on the new one, the new screen is either defective or not compatible.
If the laptop works fine with the external monitor, most likely there is nothing wrong with the motherboard. I still think it’s just a bad screen.
April 22nd, 2010 at 10:12 am
Hello,
I found your website (BTW excellent read) because I have problem with my laptop screen. I dropped the laptop and broke the screen (large black area in the middle) – when on there is white light and black broken area. I connected it to the external monitor and it works fine. I just bought new screen but it doesn’t work, there is only white light. I tried to reconnect VGA cable a few times but without any change. I removed VGA cable and turn on laptop, only white light as before. I assume there is either VGA cable faulty or any chip on motherboard? If motherboard why I it works on external monitor?
Your help is very appreciated!
Thank you,
Daniel
April 15th, 2010 at 8:47 am
Alan,
I’m not sure if this is a video card problem because you said the external monitor works fine. Are you sure the external video works properly? Take a closer look at the external video again, maybe it has some lines or other problems?
If the external monitor works fine but there is no image on the laptop screen, it’s possible that you have a failed LCD cable or LCD screen problem. It’s hard to tell without seeing the laptop. Try reconnecting the LCD cable on both ends, on the motherboard and LCD screen.
April 12th, 2010 at 7:02 pm
Hi, I have a problem with my Acer laptop and hoping to figure out what’s wrong with it.
It turns on and screen lights up but no image is displayed. I can connect an external monitor and get an image (but still no image on the laptop itself) but I see that the startup screen with the manufacturer’s logo has lines running through it similar to the images here http://www.laptopparts101.com/graphics-card-video-board/
Would this be a video card problem or LCD problem?
Thanks in advance
April 12th, 2010 at 8:38 am
jediknight111,
It’s possible the LCD cable is not making good contact with the motherboard or LCD screen. Reconnecting the LCD cable on both ends might fix the problem.
April 5th, 2010 at 4:55 pm
HP laptop laptop used to flicker when moved up and down , opened up the laptop and pinched the LCD cable and came pack on
Do I need a LCD cable then, and where is the best website to buy parts in the UK
Reply as soon as possible please, I need your heeeeelp!!
P.S Great vebsite helps a lot
March 31st, 2010 at 9:11 am
Eric,
First of all, this problem is not related to the inverter board, that’s for sure. The backlight lamp lights up and that means the inverter works properly.
1. Check connection between the LCD cable and new LCD screen. Maybe the cable is not plugged correctly.
2. Try reconnecting the LCD cable on the motherboard. Maybe the connection is loose.
3. If reconnecting the cable doesn’t help and the new LCD screen is a known good one, most likely this is motherboard failure.
March 30th, 2010 at 3:23 pm
hi
i have a c700 and the screen is completely lit up white. i bought a new lcd thinking this was the problem being that when hooked up to an external monitor it is fine. this new lcd screen still has the same problem. so i bought a new inverter and still white screen what else can it be. i am going nuts over this. thanks in advance
March 29th, 2010 at 11:08 am
Barbara,
1. Make sure the new LCD cable is connected properly. Try reconnecting the cable on the motherboard and LCD screen.
2. It’s possible that the LCD screen or motherboard was damaged when the LCD cable shorted.
March 24th, 2010 at 11:27 am
Hello,
I have a problem with my laptop, the wire hairs of my LCD CABLE came together, causing a short circuit, turn off my laptop and I bought a new LCD cable… I connect it on the motherboard but when the laptop started, the entire screen is blank. An external monitor works fine.
Do you know what can be?
Please help me!
thanks!!!
Bárbara from Concepción Chile
January 20th, 2010 at 2:56 pm
hmm… that would seem to be an issue related to the turning off/on itself. you mentioned the resolution is to turn computer off ‘completely’… but you said that this occurs when the laptop has sat turned off overnight. i’m gonna assume that that means it was siting in standby or hibernate.
anyhoo… it’s probably something related to the standby or hibernation settings on your computer. maybe something in the bios… perhaps a bios update is needed.
December 3rd, 2009 at 1:58 pm
Hello. I have an Acer Aspire 5100 and am having a strange problem with the LCD screen. Symptoms are as follows:
- Usually after the laptop has sat turned off for some time such as overnight, upon powering up the laptop the screen does not turn on. The computer boots up normally and video output comes through the external monitor connection but the LCD screen will not operate.
- Resolution seems to be to turn off the computer completely (going into and out of standby does not work) and tap lightly around the bottom of the LCD bezel and back of the laptop, as well as rapidly pressing the LCD switch (this may be superstitious habit). Sometimes shut down/tap/restart procedure needs to be repeated a few times to get the screen to engage.
- Cannot seem to get the problem to repeat once the screen has come on in one session. Only happens again after the laptop has sat turned off for some time.
- Screen has never turned off while laptop in use.
Great site, thanks in advance.