I had this happen once where the balls were magnetized but that is not likely in you case.

I have also had a switch "sometimes" work in the trough area where the switch was wired incorrectly (wrong lugs of the switch) from the factory! You could also have a bad/open diode OR, MOST likely, this...

There is a type of clear plastic "sheath" that goes over the switch connections and diodes in this area of most system 11's. I would gently tug at each wire/diode/wherever there's a "sheath" to confirm that at some point, a previously disconnected wire was not just "shoved back up in" the plastic sheath to attempt a "quick fix" and not actually soldered to the switch lug or diode connection.

Why? "vibrations" is the short answer. I'm just suggesting crazy things I've seen over the years and you have to tug on wires sometimes to address the "barely working" circuits a lot of times.

It would be worth testing the diodes on the trough switches and also the shooter lane ball kicker diode as well. When checking that, also look at the "very small wires" on THAT coil to confirm they are soldered very well and not just "touching" the larger lug of the coil. (You may have to remove the coil to see this.) You can additionally check the coils ohms (resistance) at that time. Should be between 4 and 15 ohms depending on the coil type.

Yes, you could have a bad/shorted diode on any switch in the game causing this crazyness... Best to try and confirm that EVERY switch is working and that none are "stuck shut".

So, if i'm reading your notes correctly. You have an issue with both the GREENN-BROWN wire AND the GREEN-BLUE wires.

There are a few places this could have "come disconnected".

The coin and slam tilt ones aren't going to keep the game from working and may just be due to hacked up coin door wiring. I wouldn't worry so much about those right now...

I would focus on trying to find where the GREEN-BLUE wire is not making contact. First thing to check is a continuity test between one of the GREEN-BLUE wires under the playfield and make sure it's getting up to the driver BOARD in the head at (IJ8-PIN7).

If it is not, push the GREEN-BLUE wire into it's "punch down style" connector better with a small flat screwdriver (not TOO hard though).

For testing purposes, it's fine if you just run a "test wire" directly from this GREEN-BLUE pin to the corresponding GREEN-BLUE wires under the playfield, then switch test again to see if that gets those switches responding again.

Also keep in mind that a wire may have simply "fallen off" or desoldered itself from one of the GREEN-BLUE switch lugs in question. (They are all "daisy-chained" together). You may have to check every one on the GREEN-BLUE playfield switches for a disconnected wire somewhere.

sweet!

Also known as "IDC" connectors, short for "Insulation-displacement connector". One of the worst/cheapest decisions pinball manufacturers ever made.