Looks like the screen is OK, but the computer is not booting up and stops during the POST phase.
Any beeping or LED code?
If beeps, what kind of sequence?
If LED code, what sequence do they show. It can include steady and flashing lights combinations from the Num Lock, Caps Lock and Scroll Lock.
It can be unseated or faulty RAM, a bad CPU or something else.
Electro, June 2012