If you're getting no errors during POST and you can actually SEE the POST/BIOS messages, it sounds like most of the board is working. The only thing that comes to mind is that somehow the video display settings have gotten set to a value beyond what your monitors can auto adjust to. What shoots a hole in that theory, tho, is I'm pretty sure the XP start up screen displays in a low enuff res for almost any monitor to display it. Once the OS finishes loading, then the actual pre-set resolution should kick in. Do you have a custom splash screen for XP that might've gotten hosed? I take it you NEVER get a desktop??