I just bought parts (over a period of time) for a new custom computer and I have been slaving away at pulling it together. I have everything set up, but the computer won't start. It powers on, whines at a really high pitch, and then shuts down. The motherboard light stays on, but everything else just shuts down. I tried stripping it so now I only have the CPU, PSU, hard drive, graphics card, and motherboard attached. It seems like as soon as the fan for the CPU starts, the whining--and the shutting down--starts. There's nothing in the way of the fan at all. Can anybody help me?