I have a Williams Grand Prix that seems to work fine for one player.
Once I put it on 2, 3 or 4, problems occurs.
The player will not advance beyond player one and will remain on ball 1.
Here is what I checked so far:
-Player unit in backbox advances when manually triggered, but coil is not firing.
-Trace it back to the player reset relay, which is also not being triggered. checked switch on relay, all ok.
-Trace player reset back to the switch stack on the score motor, and verify the switch is triggered by the score motor.
-The score motor triggered the switch stack after P1 ball 1, but the player reset doesn't fire.
Any ideas where to look to troubleshoot fix this issue?
Thanks.