I have a Solar City from Gottlieb that was working fine. That was until I used a flexstone to clean some switches on the score motor. I only cleaned the top two rows so most likely D ans E rows (may be some on row C). Since then the machine won't move from ball 1 to ball 2 like it had an extra ball. If I manually move the coil in the back box to player 2 then the ball count moves up from ball 1 to 2 for example but then it won't move to the next ball when player 1 is done. So it seems to be a player 1 issue. I have the drawings but can't figure it out. Any ideas?