Ok have a really early build EHOH. Have a problem i just cannot figgure out.

The issue is with the cellar switch. The "outhole" sort of under the house in the cellar.

Game works fine then all the sudden door opens and tries to kick the ball out repeatedly. Then throws a opperator allert. " cellar malfunction.

Seems simple right? Open it up pull out the switch. Works find in test. Opens and closes. No problem.

Put it back, all seems good. Il leave the game on and 20 mins later. Its kicking again. Just on its own while in attract.

Ive been playing a game when it start to act up and it acts like the switch is closed for an extended period of time. Till it throws the code.

Checked wires. Updated code. Even adjusted the switch thinking it was too close or maybe the kicker was scraping on the activator. None have solved the problem.

So bad switch? Do they just randomly close?? Node board? Is that what happens when node boards go bad?
This one has me stuck.

Goes into a connector right away. Then the manual says its this IDC on the node. All looked good. I reseated them both. Checked wires. Hasnt acted up yet. Il leave it on a while. Fingers crossed.

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Nope. Halfway through a game. Same problem.

Any other ideas?

Did not know there is a backdoor opto. Thought it was just the switch. Il be checking that next.