I picked up two systems this weekend to fix for a friend. However, something wierd happened in the move. The power supply failed in one and I cannot get either to work with my monitor. Is there anyway I can trouble shoot to see if the boards went bad. One has a internal video, doesn't show on my monitor. The other has a PCI does not show up. My home PC & laptop show up fine. My PC has an AGP card and will not fit in either, and the PCI will not work in either.