I got a 550W PSU if that's what you mean. I bought this computer about 3 years ago, it's a Pentium 4 3.0.
I think the on board graphics got disabled too or something, when I turn the computer on after the Windows XP loading screen it just goes to a black screen but the light is still green, you could even hear the Windows log on tune with the speakers on.
I'm using another computer for now because the screen won't show anything with a graphics card or on board graphics.
Everything is working fine except the screen won't show anything other than the XP loading screen.
What's the problem and what can I do?