I'm having a weird issue with my Fathom that I just rebuilt. Here's the overview -

All new Alltek boards. Everything tests properly including all the switches and solenoids.

Here's what happens. If I lock a ball in the green lagoon, the green inline drops reset to the up position and another ball is served into the shooter lane. This is the expected behavior.

Now if I lock a ball into the top blue lagoon, the game acknowledges it by playing "Diver Captured", but the blue inline drops never reset and another ball is never served. The game just sits there. I've also verified that switch works by dropping a ball into the saucer during the diagnostics.

I haven't put the original CPU back in to see if that's the problem as the game has been apart for *many* years and I'm not exactly sure that board functions anyway.

Any ideas?

I'll check that out. Thanks for the tip.

BTW, can someone post a picture of the two switches to the left of the outhole switch? I'm particularly interested in how the wireforms on those switches are bent/positioned.

It may be a while before I get back to it but will definitely report my progress once I do.

SOLVED! Here's what I did.

First I tested all the trough switches. I was pretty sure they were good but wanted to verify. No problems.

Started a game and shot a ball into the top sink hole. "Diver Captured" played but the inlines never reset. Arg! I reset the game and tried the green lagoon - ball in the sink hole, sound played, inlines reset as they should. It was then that I noticed the green arrow to the lagoon was off. Figured that was probably normal as I'm not real familiar with the game. Shoot the first two inlines, green arrow flashes, shoot the third inline and the ball is released. Normal.

I went back to the blue lagoon. Shoot the ball into the sink hole, sound is played, inlines don't reset. And HERE is where I figured it all out. I noticed that the blue arrow was still ON. So I reset the game, started a game, but this time I held down the blue sink hole switch with my finger. Sound triggered, inlines reset and another balll was served. Yes!

Apparently the blue sink hole switch was gapped just enough that the switch would close very briefly when the ball dropped onto it but open immediately after. So I gapped the switch properly and now the game is 100%!

I had this problem right after I did my swap. Ended up being the gap in the sink hole switch.

When the ball would drop into the sink hole, it would close the switch just briefly enough to trigger the callout. But the switch was gapped *just* enough that it was open, even with the ball sitting in the sink hole.

Once I gapped the switch so it *remained* closed with the ball sitting in the hole it worked perfectly.

Listed a Fathom floor mat that I purchased a few years back and never used.

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