A few nights ago, we had a power outage at some point during the night, and I woke up to find my eMac powered off. I turned it back on, it fully booted and I began to do a bit of browsing. A few minutes later, the CRT instantly goes completely black. (this happens often if the machine is powered off or is allowed to go to sleep, and for this reason I always leave it running.) So I force it to shut down, wait about 15 minutes, and turn it back on. But instead of booting, it sits at the grey Apple screen with the spinning circle of lines (...or whatever it's called) and stays there. In hindsight, I should have come here for help at that point but for whatever reason the only solution I saw was to reinstall OS X. Thankfully, I had very few files located on its hard drive that I don't have copies of, and none of them really important. So I precede to pop in my 10.5 disc and give it ago. Things work well for most of the process, until we get to the "About 10 minutes remaining" message. At this point, the loading bar still appears to be signalling progress, but I can no longer hear the optical drive nor the hard drive making any noise. I've let it sit there for about half an hour with no changes, and I've tried twice. Now, I do admit that my 10.5 disc is not in the best of shape - but it hasn't been terribly abused either. Could it still be the issue I'm having? And for why I'm doing this in the first place, could I have corrupted system files on the hard drive when I forced it to shut down? Or something else? Thanks for your help!