|It ain't drivers. How do you know everything works if the monitor doesn't come on? I'll bet you can hear the fans and drives spinning and the LEDs are flashing so you think you've got a video problem. No, something happened while you were inside the case. Maybe you weren't grounded and you zapped something. Or maybe yoiu nudged a card so it's slightly askew.|
Make sure the power cord is not connected. Then, if you've got a video card and not on-board video, remove and reinstert the card, making sure it's in good. Do you get a posting screen now? If not pull all the cards (except video) and disconnect all the drives. Then see if you get a posting screen. Again, make sure the power cord is disconnected when fiddling around in the case. Most power supplies will provide a small current even when off. Not enough to shock you but enough to blow up sensitive circuits when mishandled.
Real men don't use AntiVirus; they just reformat