After running smoothly the past year, suddenly my Little Joe pin won't start running.
When switching power on, I can use the left flipper button and the lights are glowing. Also the lock-relay is activated.
After that I push the big round button on the door cabinet to start a game (the credit reel is showing 25 games), but I only hear one click. This is because the credit-relay is also activated. And that's it, no more activity.....
Hope you guys can help me...

HowardR , MrBally and xsvtoys thanks for the reply.
I've checked your solutions:
- manually running the scoremotor: after a small manual turn, the motor starts running one complete cycle and stops; the pin doesn't start a game.
- checking hte wiring of the cabinet-door: all wiring from cabinet-door untill Jason plug is OK, no disconnected/broken wire.
- following the sequence: Credit button activates the Credit relay (approx. 55 volts), but the Coin relay is not activated. no current on the coil....no game!

But I found out that the top switch on reel #6 of the scoremotor was not closed by default. When adjusting the leaves, so the switch was closed, I could start a game with the credit button. So for now the problem is solved!

Dear MrBally , you're absolutely right! As I try to recall how this could happen, I remembered a previous clumsy action, in which I probably touched the sm-switch....
I definitly need to invest in more focus during my pin-work
Thanks and have a nice weekend!