Hey guys, a few days ago I came across a Gottlied Magnotron at a local thrift store I frequent. I took it home for $400. My first mechanical pin (I've built and sold a virtual pin and currently in the process of building another).

Anyway, the machine mostly works. It only has a few quirks that I need to figure out.

First, occasionally after finishing a single player game, it starts the next game in 4 player mode.

Second, and this just started happening today, after completing a single player game and draining the 5th ball, it kicks the ball to the shooter lane like a have a 6th ball but there is no ball in play lit, no game over lit, but everything else appears like game over. Additionally, the scoring reels do not register any points while the ball is in play at this point. When it drains, it just immediately kicks the ball back to the shooter lane.

Its pretty much exactly like this > https://pinside.com/pinball/forum/topic/no-game-over-after-last-ball

In that thread, the OP said he fixed it by cleaning the dots - "It was as simple (as most often) as just clean the dot's at the player unit rotating disc.
Now it works 100%"

I suppose I should try that first. Can someone tell me what I should use to "clean the dots"?

#magnotron