well, crud, I went and messed up my Lectronamo somehow. Has a new Weebly CPU board in it too.
Had it actually playing a game, except the outhole coil wasn't working. The coil ohm'd out ok, voltage was good, and I could fire it by grounding the transistor tab. I didn't have any transistors to spare, so I pulled an unused one from Q1, and used it to replace Q4.
Well, something happened the game just didn't like!
I get into attract mode, but it doesn't reset the drop target banks during boot, I don't hear the relay clicking during boot, and even testing at the CPU board I don't have any stuck switches but they do show up during switch test. I did re-install Q1 with a fresh TIP102, but no change.
Displays work, controlled lamps are working, I have solenoid voltage.
Not terribly familiar with how the MPU-100 works, so not sure what I should be digging into next. From all I understand, if a PIA is dead, it shouldn't get into attract mode.