OK, big shout out to pinballj for sending me a new ROM to try out on my Echo Lake board.
Here's what I can report as of today:
When I tried the game with the new ROM, I still have the same issues in gameplay. This tells me that either a) there's something very weird that is wrong with the switch matrix, b) Jeremy's Cyclopes doesn't work either, and he just hasn't realized it (this seems exceedingly unlikely, lol), or c) there's something amiss in the switch wiring.
To review: the problem I have been having is that once the drop targets are hit, the spot targets do not score. Weirdly, they do make the sound effect, which I would not have thought possible, but my understanding of electronics is pretty cro-magnon if I'm being honest with you. The result of this is, once you hit all the drop targets there's no more game play, as it's kind of frozen there. This is the opposite of the point of Cyclopes! Weirder still...sometimes the targets seem to work correctly, but mostly they don't. It seems almost random. But, when they do seem to be working, it never lasts through a game. The inconsistency of the problem is incredibly maddening.
I did a bit more sleuthing just now.
Putting the game in switch test mode, all switches individually register. However, if I drop the targets and press the spot targets behind them, the spot targets do not register.
Now, this behavior occurs elsewhere among combinations of switches as well, and I am assuming it is due to the layout of the electrical path through the switch matrix. But, again, cro-magnon understanding of electronics, so I can't tell if this is a valuable clue or me just being easily confused.
I will tell you, though, that this is not my first rodeo with figuring out some switch issue after doing a full playfield restoration; it's not uncommon to find something shorting out and causing trouble, so I am used to looking for stuff like that. IT would be extremely helpful to have a proper switch matrix chart, but unfortunately, this is all you can find from the manual at IPDB:Screen Shot 2022-01-16 at 3.41.56 PM (resized).png