by Phil.c » Wed Aug 14, 2019 4:54 pm
There's six ribbons from the bottom of the Brain board, 3 can be got at going to the fader banks but 2 run behind, I don't know if this is your problem but a bit of stripping is needed to get to the connectors, also there's a few that can't easily be got at right at the back of the desk.
I had a problem with something once and it was from a hidden connector. you also need to check that the ribbons are seated properly on the connector blocks, because if they're not, just re-seating the connectors won't work.