Okay, I just finished putting together my computer, I plug it in, turn it on and the LEDS flick on and the fans spin, for about .5 seconds, then dead. I checked the cables hundreds of times. Everything is hooked up and as far as I know, hooked up right. It's not a too little problem as the case and psu used to belong to a friend who had more things hooked up to it, and its only a few months old. I can't think of anything that could be wrong except the power supply though, what do you guys think?