Ok here's what I got. I had a friend bring me his computer. No power from the power supply, so I replace the power supply. Ok Now I have power, but it doesn't boot up. No beep no nothing. The cpu fan starts running as soon as I turn the power on on the power supply itself, not the power button on the front. I'm thinking the motherboard is toast, but I've never had one do this before. Any help would be appreciated.