So, for whatever reason, last week my computer started crashing. It got to the point where it wouldn't boot at all, and then booted into the BIOS and said it hung because of an "improper external CPU speed setting" although I had never switched it from the 1 ghz it was running at (we never got it to run at 1.33 like it's supposed to). Got a new mobo/CPU, a 3100+ Athlon Sempron, assuming my old mobo was shot. Plug the new one in, and we can get as far as "Entering Setup" and then it hangs. I know we don't have ideal RAM for this setup, but we can't even get into the BIOS. All I can figure is that the 300 w power supply isn't enough for it, or the mobo was dead out of the box. But that's me, and I'm not quite as savvy when it comes to hardware, so I'm here for a second opinion or ideas on how to get it running. Help? Thanks!