Ok, I just replaced my ancient MoBo and 1.4 AMD CPU with a AMD 64 2800 and a ABIT NF8 MoBo. Problem is, after I hook up the powersupply I get a red light on the MoBo, but when I hit the power switch on the case I get nothing. No fans, no beeping, nothing. To make sure it wasn't my power supply or power switch I dropped my old Mobo and CPU back in the case and everything is working just fine.
What could the problem be?