recently purchased a 17pb bto, 5400rpm, 128vid card, about a week ago, seemed to be working fine. had 2 accounts setup, was updating an 3g ipod on the second account, had trouble recognizing the ipod on the desktop, tried closing some apps, got spinning ball, couldn't do anything else, finally switched to the other account, closed most of those apps, however itunes wouldn't close, got spinning ball again. tried force quit, was asked for admin id and password, entered it, but still spinning ball. nothing happened for a few minutes, couldn't seem to do anything, finally pressed and help the start button. now a black screen. appears to be asleep, if i press a key i can hear something (hard drive maybe?), but nothing. sometimes i can see a slight outline of the screens like you would see if you activated expose. but can't seem to do anything. called apple support, but didn't realize they don't offer support after 6pm. for a switcher, this sounds unbelievable. any assistance would be greatly appreciated. thanks in advance.