have a lady luck pinball by williams
it has developed a problem in that it plays a one player game fine ,but when in 2 player mode it doesn't always trigger the ball count unit ,which also controls player one and player two so you will be stuck on player one or two, ball one for example if you keep playing it will eventually trigger and advance to other player or ball, and then it may get stuck again i cleaned the unit well and all contacts seem good
but i think it could be a switch in the score motor ? anyone have any info that would help
and thanks again
jim

Fixed it .the problem was the extra ball switch would reset but one of the two blades of the switch wouldn't completely close .so when ball drained it wouldn't always trigger the ball count unit . adjusted the blades and now all is well