I added a new hard drive to a computer after the old one went bad. I had to remove the processor and heatsink to insert it into the available slot. When I reinstalled everything, checked cables, and made sure the heatsink was plugged into the motherboard I powered it back up. Unfortunately only the devices that were not powered by the motherboard powered up. Is this a sign of a dead motherboard or maybe just bad motherboard power plugs? Also, not sure if it's related or not, but the power switch will only turn the computer on. It will not power it back off even by holding it down. The only way to power down is by pulling the plug on it. I've stripped the board down to nothing and still seem to be getting the same problem. Doesn't seem to be grounded anywhere, so I'm at a dead end. Please help!