Someone in a different forum is selling one of those iMac G5's with the power problems that cause it to suddenly shut off after a few minutes of use. Is there any easy and cheap fix to this problem that would make buying it worthwhile? I don't mind if the fix is ugly or inelegant, I just want it to work reasonably reliably. Does anyone know what the actual cause of these shut downs is? Searching the MR forum, I read something about how maybe a capacitor on the power supply is the problem, someone else said maybe it's a problem with the logic board, but I couldn't find a definitive answer. I'm thinking that if the problem is simply overheating due to a faulty component, then I could just run it with the back of the case off and add a couple of fans. So I need to know, is there any cheap and easy solution that would fix this problem? He's asking 100 bucks for it, but I think I could probably talk him even lower. p.s. The special extended Apple repair program that was offered to fix these machines seems to be over according to this page I found.