i have toshiba satellite pro m70 laptop .its first i connect adapter led blinking after is not linght.,,how can i fix this

First, I would test the AC adapter. Make sure the adapter outputs correct voltage.
It’s possible your adapter died and the battery doesn’t have enough charge to start the laptop.

I have a Toshiba satellite L300 and the battery charges when the laptop is off but when I turn it on and plug in a AC adapter it RESTART.. Does that have to do anything with the motherboard.

Yes, it’s possible. What happens if you remove the battery and start the laptop just from the AC adapter?

Yeah the charger is good I think it would be the motherboard? Do you know if this can be fixed or replaced?

The motherboard definitely can be replaced but is it worth it? You’ll have to search on the Internet for a new motherboard and see how much it is. Prices vary depending on the laptop brand and model.

Just replying to the previous message below. Yeah the charger is good I think it would be the motherboard? Do you know if this can be fixed or replaced? if so how much approx?

Thank you

When i connect the charger on- its totally dead.

If the charger is good, most likely you have a problem with the motherboard or DC jack. I really cannot tell which one is failing without looking at the laptop.

I really don’t want to get a new one as there are important files on it.

Most likely your files are still safe. You can access all files using an external USB enclosure as explained in this guide:
http://www.insidemylaptop.com/recover-files-from-broken-laptop/
Just remove the hard drive, install it into the external USB enclosure and connect this enclosure to any other working PC.

I have this dell laptop and its not working, I overheated it by accident and now it won’t turn back on at all. When i connect the charger on- its totally dead. I had this problem before but got it fix by a tech guy which cost me around $300. And its not my laptop so I really don’t want to get a new one as there are important files on it. Can you help me? what can I do?

I have a Toshiba M105-s3041 laptop… My computer turn on and then off. I want to try to remove the CMOS Batt But Its sold to the motherboard. How can i reset the bios, so i cant be clearly that is something else???

Before you disassemble the laptop, try some simple stuff.
Have you tested your AC adapter? Maybe the AC adapter died and the battery doesn’t have charge. Can you test the laptop with another adapter?

I have a Toshiba M105-s3041 laptop… My computer turn on and then off. I want to try to remove the CMOS Batt But Its sold to the motherboard. How can i reset the bios, so i cant be clearly that is something else???