I just recently assembled a computer. I've built a computer before, and can't seem to figure out why this one won't turn on. I have an abit-n68sv series am2 slot motherboard, an amd athalon 64 am2 slot processor, corsair 2 X 1gig memory modules, a dvd rw/r drive, a western digital 120GB ide hard drive, and a thermaltake armor mx vh8000 series case. I've connected everything properly, and it just won't turn on. The motherboard was designed for a 24-pin atx12v / 8-pin eps12v power supply. i have a 20-pin atx12v / 4-pin atx12v power supply, and i thought that could be the problem, but the manual for the motherboard says it can handle it. so i'm at a loss, anyone got any ideas?