I had a similar issue when I bought it but after cleaning a lot of switches it stopped.
Here’s what it’s doing: When I push start button the score reels all reset to Zero like they should but the score motor and the 1&2 and the 3&4 Reset relays in the backbox keep running.
If I manually step up a few of the score reels on the 2nd player reels and then turn game on and start a game, everything resets and the score motor stops, the 1&2 and 3&4 Reset relays stop and the ball kicks out to the shooter lane. In other words it starts a game like it should.
But after I play a game and push the start button to play another, the score reels all reset to zero but the original problem occurs with the score motor and 1&2 and 3&4 Reset relays won’t stop running.
Wondering why manually stepping up a couple of score reels stops the problem temporarily? Thanks