I just built a used system for a buddy to use for email. It worked fine for me, but when he hooked it up to an old compaq monitor it showed a scrambled picture of the desktop. The post was fine and readable and then the windows insignia was fine on bootup, but when it got to the desktop it was like the horizontal and vertical were all screwed up. I could see like six of every icon and the screen was really wavy and had lines all over. Is this monitor incompatible or is it something in the bios? Or is the monitor just shot?

system specs:
pentium 233
64 megs ram
ecs mobo
win 98fe

Thanks