Okay, so last week my power supply died, and I had it taken to the Apple Store, and they replaced it. It was given back to me, I turned it on, ready and eager to use it again, and when I opened up Mail, my computer froze up. I couldn't even do a force quit. So, I turned it off, and when I tried to start it again, it just got hung up on the white apple loading screen. It just sits there, spinning around, and after about a minute the fans kick on super loud. I've left it for almost 5 minutes, but it just sits there. I've tired using the reinstall discs, but when I get to the "Pick a Volume" it won't load anything, it just sits there "Gathering Information" I tried using the Leopard and the Panther discs, but with the same results. Disk Utility shows that I have the HD there. I'm really, really hoping that my HD didn't just corrupt out of nowhere. What can I do here? I'm not about to take it back to Apple because, whatever they did seemed to mess it up. Anyone got any suggestions what I can do?