I have a KDS LCD monitor #S3F attached to an HP 6470z. The box uses an onboard ATI Rage Pro Turbo video. The problem is that the screen becomes jittery, or the left side looks smeared. I have tried:

Latest video drivers
All refresh rates
Smaller screen size (makes it worse)
Another LCD screen (same model)

I am thinking a new video card in that I know some older video cards will not run an LCD effectively. Your thoughts before I go out and spend the $50 for a new one?

TIA