I have a white Core Duo 20" iMac that I have very stupidly killed. I had the computer opened up to re-solder the wifi antenna (which had gotten disconnected). I was plugging it in, checking to see if it was getting wifi reception, and shutting it down/unplugging it to make adjustments. All was going well until one time I just forgot to unplug it, was moving the display panel to get a better view of part of the antenna cable, and then POP! it was dead. It won't start up or do anything, so clearly I shorted something out. There literally was a little "pop" sound and that was it. I'm not expecting any easy answers or miracles here, but any advice is much appreciated. I really should have just been more careful and double checked that it was unplugged, but hindsight is 20/20. I'm guessing the problem lies with the power supply, so if anyone knows how to replace the power supply (and where to buy a replacement one) that would be fantastic. Any other ideas are welcome too. Thanks!