Same prob…mine was a year old. Common prob with the 15,16, and 17 inch screens. The back light is dead, you have to send it in for repair.
Toshiba will charge $2500
Best buy will be about $500-800 depending on the brand of screen they replace it with.
Toshiba will take 8-12 wks
Best Buy will take 6-8 wks
no other options unless you can find local shop willing to replace the screen.