My friend had a similar issue with his PC. When the monitor was plugged into the video card (a PCI based Radeon x1300) , he could see the BIOS splashscreen and could load the BIOS, but as soon as windows was loaded, the screen went black. However, we discovered that we could switch the monitor cable over to the IGP now, and see the OS running... you could also do the process in reverse (plugged into the IGP you couldn't see the BIOS, but could see windows). We ended up fixing it by disabling the IGP in windows and the BIOS, because for some reason when we disabled it in the BIOS XP didn't seem to notice... first off, try switching your monitor to the IGP (I'm assuming you have an igp) once the screen goes blank. Then, under devise manager, disable /uninstall the IGP. Make sure devise manager shows your video card though, probably with some error sign near it. I could be completely off base though, if you don't get an image switching to the IGP I don't know what to tell you, other than to make sure you have the right video card enabled in the BIOS.