I am having the strangest problem with my computer. It had been working as of earlier in the day, however, I had used some of the components to test out a new machine. When I put the components (vid card, sound card, hard drive) back onto the motherboard I ran into a problem. The system seems to power up okay, the fan turns on, the hard drive spins up and the cd-rom can open and close fine. The video card is where the problem is. The fan works just fine, but i cannot get a signal to my moniter, which just cannot get out of standby. I have tried 3 video cards in the agp slot and they all do the same thing. I have even tried changing power supplies, and power cords, to no advail. any help on this matter would be very appreciated.