I have an old 17" Mitsubishi monitor at work (I can't remember the model #). It worked fine on my Mac but when I hooked it up to a PC I couldn't square the screen. It was under warranty so I sent it back and got a Diamondtron Pro700. Same problem.

Is the problem the video card? I have a 400 mHz IBM computer. I don't know off hand what video card is in there. Maybe Savage?