@Roger_Roberts - it doesn't look like any work has ever been done and it's fairly clean in the compartment. Both C1 studs were internally connected, but I can see it would be easy to over torque and break. I'm hoping it's not the card because 1) used cards don't seem readily available, 2) I'd be taking a risk the card even works properly, and 3) new cards are ~$1600. Hoping 2 and 5 do the trick!