I just recently purchased a 2004 iMac G5 off of eBay last week, and I'm having some issues with it. The iMac keeps shutting down whenever I put it to sleep. It'll stay asleep for about ten seconds before shutting itself down. The listing said the iMac is in great condition, which it is, but the fact that it shuts down without me telling it to do so. It seems like I purchased an iMac with faulty capacitors. Yet, upon looking at the inside of the G5 after I unboxed it, the capacitors look to be in fantastic shape, and it doesn't even seem like they're faulty. I've searched this forum for solutions to the issue, and I reset the SMU button and even tried the unplug power cord/wait 10 seconds/plug in power cord while pressing power button, but to no avail, the problem didn't go away. Can someone please help me? I really don't want to have to replace the logic board for a couple hundred dollars if it's not necessary. I'd love the iMac to sleep when I tell it to sleep, but if that'll cost me a big bucks, then I'll keep it the way it is. Other than the random shut downs, there's nothing else wrong with the iMac. I love it. Here are pictures of the capacitors. Do they look like they're bad or going bad? Maybe the problem with them is as obvious as the others. I'm in contact with the seller, so hopefully he will help me out. But, I would still appreciate any help that you all can provide. Thank you.