One PCI slot on my mobo appears to be brocken. When I stick SCSI card into it, my system won't boot, when I stick sound card into it, sound card makes a funny noise when I'm playing a game. Those cards work fine in other slots. This is not a DMA, IRQ problem isn't it? If not, then what could it be? I mean besides the fact that it's motherboard. What exactly on the motherboard? Could it be one of the capacitors that is bad? I'm wondering if I recap the board could this fix it or not?
Sometimes PCI slots just go bad... it could be a bad cap, but it could also be one of the other hundreds of components on the board, a cold solder joint, or just a fluke like a defect which causes a voltage imbalance to that slot.