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Hi guys, I recently got a faulty Shadow Force PCB that I have been messing around with. Have now gotten all of the ROM checks to turn up OK, and sound works fine as well. But I still have a major graphics error, the backscreen is shown in a white and black pattern, instead of pure black, and...

Hi guys, Been following the forum for some time now, so I thought it was time to make an account :) I have a problem with an old arcade crt monitor which scrolls the screen vertically. I've changed the caps, resoldered the connections and even changed the vertical transistor but nothing seems...