I built a PC in January and immediately started having this problem where I would push the power button, but the lights and fans would only come on briefly (as if booting up) then they would go dead. However, sometimes it would power on just fine, and when it worked it stayed on until I turned it off. If it failed I would reset the PSU and try again until it worked. There was no pattern to success or failure. The power supply was a junker that came with the case so I replaced it with an Antec TruePower 430w, but the problem persisted. I then took the PC apart to do a barebones boot. I discovered that the problem only occurred when the power is connected the video card, a PowerColor Radeon 9800. I tried the card in another pc and there were no discernible problems, which led me to believe the motherboard, a Soltek K8AN2E-GR, was at fault. I RMA'd it and received a replacement and the problem still perstists. Any ideas?