HELP! What Just happened to my iMac?!!! It was working fine last night. My son listened to an audio CD then put it to sleep when he was done and this is what we got this morning. I can see the curser moving around behind all of this but can't read anything. I can turn it off and restart and it does this first, then goes to a blue screen, then returns to this. I thought maybe something had overheated so I tried unplugging it for the day while I was at work but it didn't help. I've searched this forum and tried resetting a couple of things but nothing has worked. Does a video card go bad overnight with no warning? Thanks.