My PC was running fine and then I woke up and it won't boot up. No fan no nothing. The only thing that is on are a few lights on the motherboard. It also smells like something is burnt. Is there anyway to tell if it is the motherboard or processor? I believe it is the motherboard since the fan won't come on but I don't want to buy another one and have it not be the problem. Maybe its even the switch. Anyway to tell? The printer, monitor and everything else is working fine. Thanks for any help.