Looking for troubleshooting help.
(solved!)

This has been working, and now it doesn't.

Problem: 3 green targets don't rise after locking ball in the Cave saucer. It says "Mermaids Captured" then the three green targets do not rise, and then no 2nd ball is sent to the shooter lane.

What I've tested:

1. solenoid test all three targets rise
2. switch test works for the cave saucer
3. All three switches on the targets work in switch test

Searching pinside for similar issues:
https://pinside.com/pinball/forum/topic/tech-bally-fathom

thanks!
-mof

added:
3. All three switches on the targets work in switch test

What is this solenoid expander board and its role? I keeping googling Fathom issues and this board keeps coming up as a possible issue.

Reading up on it now -- guess it's another good spot to reflow pins for good measure.
http://techniek.flipperwinkel.nl/ballyss/rep/index3.htm#expand

I know the bulb and relay work well they click quickly when you don't have 3 balls in the trough.

-mof

Still wondering how in the heck the ball can lock, the game calls out "mermaids trapped" -- which means the switch works, and the MPU knows there's a ball in there, but the DT's don't reset. It was working last night.

I can't imagine how this could be RAM / dipswitch related -- why would there be a setting that DOESN'T raise the DT's ?

-mof

Solved!

The switch was working AND getting stuck sometimes. I loosened up the switch leaves, and re-positioned them a hair. I didn't feel like I was being given much of a chance to maneuver anything.

-mof

This came back. Cleaned up the switch, and then bent it up a hair for earlier and more contact... all good
-mof