Ok, thanks Nubius.
Well, at least I have some input on that. If it were the power supply, I'd be pissed, because I had joined in on a yard sale just a few days ago and my brother-in-law was selling a power supply for $2 and somebody else bought it!
It seems it's not, but if not, I dunno what it could be. The IDE cable is plugged fine from the motherboard, and I even tried the other IDE with a different cable. I think right now I'll try it with a hard-drive hooked up that has windows 98 installed on it. If that doesn't respond, then I know for sure it's not any of my drives.
Maybe the motherboard has the problem?