My PC is constantly crashing. I've changed the processor, and video card, but it still crashes. My PC is idle, on the windows logo, then I get a black screen and nothing. Sometimes when I reboot, it won't come back on either. I know the processor was part of the problem cause the heat sink fan was too hot to touch with the old one. I don't have that problem with the new one, but it's still giving me a black screen. The only other option I can think of is that it's the motherboard as well. Anyone have any other suggestions?