Went to the health club tonight. I leave my iMac running most of the time since I host a webserver off of it. I came home from my workout to find the iMac was sitting at a completely grey featureless screen and just sitting there doing nothing. I rebooted the machine after waiting a few minutes and it chimes once and goes to "grey screen of perpetual waiting". Tried zapping the pram on boot and the cpu chimes once and goes to the "grey screen of perpetual waiting". At this point I've just unplugged it for the night as I'm out of options. Ideas? I baby this machine. I even have it on two pretty heavy duty surge suppressors (one APC, one Monster) since my last Mac (my G5 2.5) got destroyed by an electrical transformer in our neighborhood two summers ago. Yes I have Applecare. I will likely have to bring it into the Apple store tomorrow but I really didn't want to have to lug that thing into a store in the middle of December in Minnesota. Yes, I have a headache too. Any help would be appreciated.