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Museum of the Game® & International Arcade Museum® Forums
I'm at the point that I now have a semi-working Mappy board after someone horrible attempt at a repair. The last part of the puzzle is to get the background working. See the pics below. Unfortunately when I put it into test, that screen is blank so I can't see if it's throwing any codes. I'm assuming it's the video board. All roms are good, as is ram. My fear is it's a prom or pal that's gone. I don't have a spare to confirm which board or to swap parts with.