ummm, i really dont know what happened, hopefully someone will know. my sis was working on the comp and the screen randomly went blank. its a year old sony 17" lcd flat. when i push input on the side bar, the screen flashes for a sec and goes black again instantly. i plugged in my old olddddd compaq moniter, and its working great, dispite the angry head aches from usage. can someone tell me what a probable answer to this problem is?