9.2 Weird monitor problem

I have a TFT450 Flat Panel and occassionally I get squiggly-screen. It seems to happen when I come out of YaST. Sometimes it will quit after a while. It looks like it doesn't like the refresh rate, to be honest. But for 1024 I can't change it, it's locked on 75 though somehow it did read 71 once. I've used this monitor since 9.0. I'm stumped. -- <<JAV>>