I got my new 20" iMac last friday. Today I used the computer, left for a bit, and when I came back the screen was black. Okay, no problem its just in sleep mode... I clicked the mouse, hit return a few times... and it wouldnt come out of sleep. Then I hit the volume buttons... i could hear the volume tones going up and down but couldnt see anything. So, I shut the computer down and restarted i heard it starting up but the screen was still black. I turned it off again and unplugged everything... power, printer, mouse, and keyboard. Waited a few minutes and plugged it all back in minus the printer. Started right up like normal. I was asking myself what the heck happened to my brand new imac? So I changed the sleep settings to see if the computer would come out of sleep now. No luck. Same thing that happened before. Does anybody know what I should do to fix this? Its an annoying problem.