Vid Card Playing up?

[Tuz76]

Hi guys. Ive done a bit of testing and worked out that the monitor is
definately fine here. Now..

I have a TNT2 M64 Vid Card using latest 4.3.4.5 Detonator drivers.

Anywhere there is text or images there are dark lines that go all the way across the screen horizontally. I thought maybe there was a driver problem so i downloaded drivers and installed..same problem. I have tried the obvious by taking the card out and cleaning the contacts and reinstalling the card...same problem.
Not only does this problem occur in games it also occurs with anything i view..webpages, text, pictures, etc. This problem is hard to explain, but ill try to give an example..

---------------------Line of text or image-------------

the - represents the gray lines that go across the screen..the more text or darker the image the heavier this gray line is. I hope i have explained this problem so that everyone understands what im talking about, and can attempt to help me

Attempts at fixing the problem
1. Reinstalled video drivers
2. Pulled card from case cleaned contacts and reinstalled
3. Formatted hard drive and reinstalled windows98 and re installed video card
4. Tried different video drivers (newer)
5. Tried my monitor on another PC (monitor worked fine)

Thanks for any help.

[YeOldeStonecat]

Have you tried another monitor on your machine? You said your monitor worked fine on another machine, but how about another monitor? Just for laughs....if the issue stays with another monitor...I'd start thinging something else with your vid card...like something up with it's VGA out connectors.

Are you going through a KVM by chance?

Have you tried raising the refresh rate of your monitor above the default and usually non-ideal "Optimal" rate...to something higher like 85 Hz or higher?