I just installed all new Pinscore displays with the new board. The diagnostic button does not work. In addition, player 1, player 2, and the ball / credit displays are missing a couple pieces of each digit (see photos). Player 3 and 4 look to be fine. I triple checked all wires, red wire where it’s supposed to be, all connections good. What to check next? The old (original) displays players 1-3 worked fine but player 4 was completely nonfunctional.

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That was my thought. The new displays came with new cables for players 3 and 4 only because there are less pins on the Pinscore board - and those work fine.