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Museum of the Game® & International Arcade Museum® Forums
I've got a K7901 that's exhibiting some strange behavior. It looks like when the guns go from white to dark during the scan, they're leaving a bright edge, and a "tail" then extends to the raster line above and below. The chassis has brand new caps and flyback. This is a tube swap (A48ABK05X -> A48JQH90X), but I don't feel like that's the issue. Feels more like a transistor problem to me, but I don't know where to look. It doesn't appear isolated to a particular gun. In the photos below, you can see it on the text of the TPG (please ignore purity problem, already fixed), and on the health bars of Altered Beast.