Solved! Screen stays black after failed bios update.

[kostasfalis]

I have a toshiba sattelite l455-s5675 and i tried to update the bios ,it got stuck and i powered it off.Now when i power it on i hear turn on but the screen stays black.What do i do?

 

[webworkings]

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.

 

[kostasfalis]

First of all ,thanks for your answer. I connected the external monitor as you said and still showed nothing. Are we sure that the problem is in the gpu , or can it be something bios related.Should i try that thing with CMOS that i have been reading about or anything else?

 

[webworkings]

Cmos batteries would keep the whole thing from turning on, not just the display.