Such is noted if the video mode is not compatible with the display.
There is no do this fix, but most of the time I find the PC doesn't have the monitor.inf installed from the monitor maker or out of date drivers.
Bob
With my geforce 5700 le, i get some screen tearing in low resolutions in gmaes like Halo and the new tribes beta. I dont know why cause i play gmaes that have better grpahics like call of duty at higher settings iwth no screen tearing at all. My system consists of WIndows XP Home, Amd 64 bit 2800+, 768 of ram, and an MSI K8N Neo Platinum board. If anyone could help i would appreciate it.

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