I just built my computer about three days ago and I have had troubles with it since then. First I had a stick of bad ram, easily fixed because of warranty on it. After fighting with a bad OS I have my current problem. The computer was working perfectly but I needed to format and install WinXP Pro on it. So before I had the chance to exit my game the computer shut down. I restarted it hoping everything was ok, and it seemed so. It shutdown on its own again (random screen flickering has been occuring as well before and after the ram). Now when I start it up, the fans are all on, cpu, case and gfx card fans all running. Mobo light is on as well. Now the problem...there is no power or signal to my Monitor, keyboard and mouse. At first I thought it was just the graphics card was bad from when it was shipped in, but now I'm thinking it might be the power supply? I'm not sure. Abit K8N 939pin Mobo AMD 64 3500+ 939 Liteon CD-RW/DVD 2gb ddr400 Sapphire x1600 128mb ddr3 When I bought my case the guy told me the PSU was 350W, now that I have it taken out of the case I noticed it says 115V/230V and 300W without PFC. I'm guessing the power supply is actually 300W? Do you think that is my problem or do you think something else is bad in the system?