If you have a friend who wouldn't mind helping or another puter around the house, just swap out the power supply. All you have to do is pull the other PSU, disconnect your mobo power connectors and plug in the borrowed psu outside the case. If it powers on just fine order a new PSU on new egg.
Noli Nothis Permittere Te Terere!!
EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.