The other day I had the strangest hardware problem on my personal computer.
I was trying to install a scsi card. Everytime I plugged it in though my sound card disappeared. I'm trying like crazy to find out what the conflict is. Finally I notice something. When the scsi card is plugged in the sound card's back end is pulled slightly out of the pci slot. Apparently whenever I plugged in the scsi card it pushed the motherboard down just enough to unseat the sound cards back end. The sound card had a defect in the metal screwdown causing it to not go down perfectly straight into the pci slot. The end result? I had to unscrew the sound card so it could sit straight when the scsi card was installed. Strange how this stuff can happen aint it?