Also, I found a large capacitor with a broken leg. I might have broken it. Took the board and the capacitor down to my local electronics supply place and he soldered a new one on for me. I described what the board is and he doubted that the capacitor was the problem. He touched up some solder joints and removed a large relay that aligned with the non functioning jack and put it back.
At home, I touched up some more solder connections and removed the relay that runs the bad jack and the one next to it. I was going to swap them to see it the problem also got swapped but I got confused and couldn’t remember which was which. A senior moment.
Any who, put everything back in and it all works. Yay. I don’t know why, but it does. I’m a happy camper.