I was using my iMac, and accidentally unplugged it. When I plugged it back in and tried to reboot it, it got stuck at the gray screen with the Apple logo and the spinning wheel. I rebooted it, but it still wouldn't go past that screen. I've tried: Unplugging it for more than 30 seconds It wouldn't boot into recovery mode Repairing the disk I erased the disk, and tried re-installing Lion. The installation quit itself the first time, and the second time the progress bar wouldn't budge. Now I'm trying for a third time to get the installation to work, and this time the progress bar is moving very slowly and the predicted time keeps getting longer. I have AppleCare. Is there anything else I can try before taking it in to the store? It is a mid 2010 3.06 with Lion 10.7.3.