I recently moved my Black Pyramid from the ground floor to my pinball room upstairs. Before the move, the game played 100%, no issues. Once I put it back together yesterday, it will start a game and play fine except for the player 4 display.

That display will change at its own discretion between showing all zeros, or sometimes displaying what is shown on the credit/ball in play display. I've re-seated all display connectors with no change. I can coin up 4 players and it will play, but it will not display the actual score for p4.

Can you all advise where I need to start? Thanks in advance.

That did it! Thanks, Quench ! The wire on the J1 side had a tiny bit of give, so I pushed it in with a small screwdriver. All displays showing as they should now.