Chasing an issue that came up after installing a new floor (thus, machines got moved around a bit). Afterward, Frankenstein no longer has any controlled insert lights (or Geneva/North pole, etc.). The machine otherwise works perfectly right now. As noted below, the bridge rectifier is my current suspicion, but checking here to see if that makes sense to anyone else while I wait for a new part.

I've re-seated many connections, see no burnt pins, and don't see any missing connections, but do see a female 4 pin connector (only a red and black wire connected) dangling into the cabinet from CN6 on the Power supply board, but the wires look newer as if tapped into for something else (former mod?), and I can't for the life of me see anywhere that is missing such a connector. Is that connector supposed to be there? And if so, where does it go?

What I expect to be the relevant fuse (F2 on the BB) is testing good (all other fuses look to be good). This is the first time I've tested a bridge rectifier, but BR1 seems to be testing odd (the one I expect to be relevant). The other rectifiers nearby test as I'd expect from instructions on how to test, but BR1 maintains an "OL" reading when testing between the "-" post on the BR to either AC post (red lead from the DMM on the "-" post and black to AC). I get a high reading if I put the black lead onto "-" and red onto AC posts. . + to AC tests are as expected.

Not sure if that confirms an issue with the bridge rectifier (or a fault in my testing attempt), but I'll be ordering a couple regardless and will give it a shot if I don't discover a better lead on my issue beforehand.

Any help would be appreciated (even if it's just to confirm that my BR sounds questionable). If the BR doesn't fix my issue, my next planned step is to pull boards to check for cold/cracked solder.

For anyone that may stumble on this post with a similar issue and would like to know the solution in my case, the bridge rectifier was in fact the problem. Machine is back to 100%