Posted 26 December 2007 - 07:28 AM
Do you hear the POST "beep" indicating a normal equipment test, then see drive activity loading the Operating System? Do you hear a Windows system startup sound? These clues can help work out what seems to be happening.
If you hear no beep and get no drive activity, then you'd need to follow rigacci's suggestion of removing components until you get the system to boot.
If you get a POST beep and Windows loads, then you may have a faulty video card, or if the system has a video card added over on-board video, the on-board may have become enabled and is conflicting with the card, or the display is on the on-board VGA connector.
Top 5 things that never get done: