I'm sure this is an easy one but for the life of me I can't figure it out.

When the ball passes over rollover lane switch 4 - the light above it and rollover lane 1 go out. Additionally the corresponding lights (1 and 4) light up in the Grotto. The same happens when rollover lane 1 is switched - Rollover lane 4 light goes out and the corresponding grotto lamps go on.

This same issue happens on rollover lanes 2 and 3. When one lane is rolled over, both lamps go off in the lane and both Grotto lamps come on.

I've repinned the connections and the switch test comes back good.

All other switches in that row are good as far as I know.

Thoughts?

After some troubleshooting, I don't feel it's a switch matrix issue. In order for it to be a matrix issue, there would need to be a normally closed and another closed switch with a bad diode. The machine doesn't have that many closed switches at one time. I could be wrong, but that's the current thought process.

https://www.pinitech.com/switch_database.php?name=Bally_Playboy

Ha! I am simultaneously relieved that it is so simple and annoyed that I never thought to read the instructions.

I wonder how I'm going to spin this to the spouse

Thank you!