Last week, my 430 watt power supply started going bad (started to smell a burning smell) So, I picked up a 450 watt replacment power supply. I try out the new power supply; I now have no video output at all, and no power is routed to the keyboard from the motherboard. The computer itself turns on, runs fine, the p35 neo2 MOBO on-board diagnostic lights signal that everything is fine on the mobo. I plugged back in another power supply. Same problem. Any help/suggestions?