I am working on a Gateway ESSENTIAL 866 computer. The video output on this computer has been flaky. The picture that it does display contains noise such as wavy lines. There are times when the video will not display at all.

For the display noise issue, I checked the monitor on another computer. It was fine there.

That leads me to there being issues with the computer video. This computer has an integrated video port. At the current time, it seems very sensitive as it works sporadically and does not display a very good image.

To correct this issue, what would you recommend? Replace the motherboard? Add an expansion video card (PCI)? Repair the integrated video port somehow?

Also, this computer is using a flex case. The case does not support full height expansion cards. The expansion slots are approximately 3.25 inches in height. For more information on the case...
http://support.gateway.com/s//CASES/...500909nv.shtml

If adding the expansion video card (PCI), what do you recommend that would work with this case and computer? The motherboard, as Gateway refers to it, is MSI Motherboard - Pentium III 866-MHz Part number 2511559. Specifications can be found here...
http://support.gateway.com/s/MOTHERB...51108118.shtml

Thanks in advance for your help,
Jody Wood