I was running my Toshiba Satellite A135-S2376 when the screen completely froze. The cursor wouldn't move, and I could not restart the computer with control-alt-delete. I held the power button until it turned off, but when I tried to turn it back on, the green power light would come on, as would the orange light in the CD/DVD drive, but the screen was entirely black, as if the computer weren't active. I tried running the battery out and recharging it, but the same problem continues. I didn't detect any unusual heat or smell before the screen froze. I'm still under warranty if all else fails, but I'd like to resolve this on my own. I am running a Window XP (OS) so d solution on ur link: http://www.fixya.com/support/t225857-toshiba_satellite_a135_s2376_black was not applicable to me.

It sounds like they had something with that last entry; if you've used it a while it's common for the wires connecting the screen to the machine to fail, resulting in about what you described. Of course you've tried the monitor hotkey (for switching simultaneous/separate display with connected monitors) already as well as closing/opening the thing to see if the display reconnects for the moment....

Otherwise it's pretty vague what might be wrong; it could be a PC CARD cellular interface came out a bit or caught EMI, knocking out the system board (permanently or not) or any number of screen (and connection) related issues. Try running with an external monitor, looking for junk in your laptop's ports, and certainly swapping out your hard drive with one you don't mind sending for warranty service (or at least completing some sort of backup on another machine.)