Vexed and perplexed with a problem related to the eddy sensor board. Any leads are appreciated. My tech skills are pretty limited.
Here is the situation and what I've tried:
(1) Originally, hits on the crate all registered but then gradually only registered sometimes, and finally not at all.
(2) With the crate no longer registering hits in switch test mode or gameplay, I replaced both the flat eddy sensor that sits under the playfield insert and the eddy board with a new one from pinball life. Installing the new flat sensor and new eddy board resulted in no change.
(3) I tested the small two-pin connector for continuity coming from the flat sensor, and there is continuity.
(4) With both the old and new board, the LED light STAYS LIT as soon as the game boots and never goes off. I see that the old and new board both have a potentiometer and I have read a website about adjusting the pot, so on both boards I have adjusted the pot with a screwdriver to its minimum, midpoint, and maximum and run a switch and gameplay test again, but with no change. Meanwhile, even with adjusting the pot with the game turned on, the LED light on the eddy never goes off. A meter test confirms that adjusting the pot on both the old and new board does show a change in resistance.
(5) All LED lights on top of the crate do light in attract mode, and both optos in the crate under the playfield do work (perhaps irrelevant, but just in case).
(6) THE BIG ONE: During gameplay, if selecting the crate from the spider hole, the crate DOES register a hit, despite the eddy board not registering any.
So any ideas? I feel like the problem is not actually in the eddy boards, but in one of the backbox boards, which may not be communicating with the eddy. If so, which board and what could be the problem?
Grateful for any advice!