Has anyone else have problem with their Imac (New one 17/20 inch screen) as in it completely just dying on them? It was in sleep mode and then all of a sudden the sleep light on front starts flashing fast and the speakers make a buzzing sound when the light flashes... Unplugged it, the computer was hot, and started it again like 15 minutes later and it started up but only for 4 seconds before automatically shutting off (Then it attempts to start again and fails on it's own?)... did the same routine and it started up for 1 minute... then it was left off overnight and in the morning it has no response when it's plugged in what-so-ever... anyone else have this problem ever? ha