Cool, thanks for confirming!
Aaaand now I’ve got too much voltage at TP1 on the power module (~10V) and the game won’t turn on at all.
UPDATE: reseated connectors on the MPU, and it turns on…prior to, when it wasn’t turning on, the green LED wasn’t doing anything, so it was stopped before it even began. The connectors look absolutely fine from the top of the board and like they’d been replaced at some point, but looks like it’s time to take the board out (again? Can’t remember at this point whether I’ve looked under this board yet) and inspect closer.
Think I may need to get a new A2, though; that newly too-high voltage at TP1 seems indicative of a failure…does it indeed start down that at board and then make its way upstream to the MPU? Would love to understand what’s happening. Too much voltage would make sense for the game not booting, but then why would reseating connectors upstream make a difference and all of a sudden turn the game on? Or do I have the flow backwards, and the MPU is sending, not receiving from A2?
I’ve also seen inserts flickering when they shouldn’t (faintly) while playing a game before, then I turned it off and that’s when it wouldn’t turn back on. I’ve tried measuring BR1 (which is connected to TP1) but it seems like it’s reading fine; values of .4ish all around. I’ve also occasionally heard audio cues at the wrong times, though that’s been very infrequent (but wondering if that could be symptomatic or something failing - there is an Squawk and Talk replacement sound board in this game, btw).
Can anyone give some insight as to what direction things are going and why I might be seeing what I’m seeing? Im guessing this is a fairly common set of symptoms/problems, and would love to learn!