Not totally new to PC building, but haven't had to jump a mobo before. Anyway, got some new components in, put the mobo on its box, got the cpu, fan, and ram in. Plugged everythign in. Went to short the power switch and...nothing. No fans, or beeps, or lights. Went and jumped the PSU which will spin for several seconds and then stop. Is this a sign of a bad power supply, or is it just because it is not under load?