Ok, so now I've had two iMac's in 3 days and now the second one is acting up. Got it home yesterday after exchanging a bad one and the new one was working fine... until this morning. Did a shutdown on it and about an hour later fired it up. No video. Apple Care says I'll have to take it back to the store after trying everything they knew to try. I have a good mind to just leave it at the store and give up on Apple. NEVER had this many problems with a PC.