Okay, second board, same brand (biostar), same model, same problem. No peripherals connected, not even the processor, 500W antec psu, board only flashes its onboard LEDs once and then dies. No PSU fan, no USB lights, nothing. The first one I RMAd to newegg, but I REALLY don't wanna hafta wait for another couple of weeks for another RMA (not to mention this ain't my first rodeo, and this problem has got me licked). So does ANYBODY have any idea what's up? Have you run into this, and if so, what's the fix? Thanks in advance for your help.