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Hi folks, I have a sega model 1 Virtua Fighter PCB that's developed a fault recently. I've attached pics to demonstrate. As you can see it only affects the top portion of the screen, and only when polygons appear there. My memory test and TGP tests come back fine, and the board is working...

Many thanks for the suggestion. I tried connecting those points with wire and it didn't seem to have any effect. I gave up for a day or two, then came back to it this morning and fully removed the C200 cap, cleaned the area up with contact cleaner, and it now appears to be running perfectly! In...

Thanks for the quick reply. It's being run via a supergun, powered by a Mean well QP-150-3A. Voltages are all good. I've spent a good few hours playing it with no issues in the past using an ATX PSU, but this fault developed recently and I was hoping the mean well would solve it. No dice...

Sorry to necro but I'm having exactly this issue on my Virtua Fighter 3 rev a board. Corrupt text which matches the first post almost exactly, and my test button isn't working. Did you find out anything from Ken by any chance?