We have a Dell PC that the video is jumping. The desktop is fine but when we open an application, the jumping is intermittant. We updated the monitor driver and that didn't do it. Does anyone have any ideas? I suspect the video card.
The video card is one possibilty. Have you updated the video card drivers?
The monitor could be bad, and you may want to swap it with another just to rule that out.
I've also seen video distortion on monitors with handheld devices like Blackberries within a few metres of the monitor. The handheld's radio signal causes video and audio distortion in nearby devices.
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