I just bought a brand new P4P800S-X motherboard, with a 2.8GHz Pentium 4 CPU, Sapphire Radeon 9250, and a 400W Power Supply Unit. I installed them all, and then my monitor would not show a screen. I swapped the monitor with a buddy of mine, and then the PSU popped. I replaced the PSU unit with a 350 Enermax one, and it worked fine. I installed Windows XP etc. I then went and replaced the PSU i originally bought from Antec, and re-installed it. Same monitor, only this time my monitor does not register and nothing appears. Anyone out there in cyberland help me? I'm kind of in a binde here. Thanks, and I appreciate it.