Recently my TZ developed a problem. I have only noticed it so far in multiball. I first noticed that when a ball would drain that it would just sit in the trough and the outhole kicker wouldn't kick it over into the trough. I though it might be the outhole switch, but it tested fine in test mode and I even bent the arm up slightly. I then noticed when it won't end the ball and a ball is sitting in the outhole that the coil that kicks the ball up into the shooter lane keeps firing even though there is no ball there.

Here's what I've checked so far and everything has checked out fine:
1.) two ball lock optos
2.) one ball lock switch
3.) all trough switches, including far left switch
4.) outhole switch
5.) outhole kicker
6.) confirmed the game has 6 balls- five steel, one ceramic

Can anyone tell me what to look at next, I'm at a loss.

Thanks for the insight! I will probably try and re-seat the connectors on it tonight and see if that does anything. It doesn't look like that board is available; I checked GLM's site so maybe I can send it out for repair if need be.

I tested the outhole switch with both ball and finger, works fine with either. I'm not sure if I checked the outhole kicker in test mode, but I can do that.

Last night I tested all of the switches and optos that I could get to from the topside of the PF, everything seemed ok except for the left coin switch read closed, which is weird because there aren't any wires going to that switch on my game. I then reset all the connectors on the opto board and it fixed my problem, at least for now. I tested it in 2 and 3 ball multiball several times and it never missed a beat. I'm guessing the opto board developed a cold solder joint somewhere or a possible bad connector.

I really appreciate those that pointed me to the opto board, don't know how long it would take me to have figured it out without everyone's knowledge and experience.

Thanks!

Was thinking about just going ahead and reflowing the solder to prevent any future issues.

The help is much appreciated, hopefully I'll see you at Scott's in a couple weeks.