Laptop Screen wont turn on

[dfmartins60]

I was trying to replace a fan in my Toshiba Satellite u940-11l and whe i got it all disassembled i turned it on and got a blue screen twice and after that the screen stopped turning on.

I tried this solutions and still have the same problem http/www.tomsguide.com/forum/71809-35-when-turn-laptop-screen-black

Is there anything else that i can try or is my motherboard or gpu dead?

 

[webworkings]

Since you didn't mention if you could or could not see on external monitor, try this...

1. Turn the laptop off (not sleep or hibernate but off).
2. Connect an external monitor to the laptop.
3. Turn on the external monitor.
4. Turn on the laptop.

NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.

If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.

If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.