I have the same problem,
I had the laptop since December 2011 i tried various things yet nothing worked.
I currently am on support with Toshiba so far nothing.
But what you want to try is the X-tune software you can download it from here:
http://eu.computers.toshiba-europe.com/innovation/download_drivers_bios.jsp
Try it and tell me what happens ... for me it keeps saying that the environment is too dark or too light but i've tried it everywhere and on top of that it doesn't even turn on .
Well let me know if anything works