Powers on but doesn't start a game. Everything looks good except for a disconnected knocker coil and corresponding bad knocker driver transistor on the driver board. Not worried about the knocker not working. Just trying to get the game to boot. Has a Ni-Wumpf MPU board.
Here's what I have:
Power on get one LED flicker on MPU (Ni-Wumpf)
Pause then several seconds of sound/tune
Kick out hole fires once
Shows “GAME OVER”
All displays working alternating zeros then high score
Display shows 4 credits
Start Button does nothing.
Any specific testing guidance appreciated.