Oberheim TVS1 Trigger Issue

My Oberheim Two Voice is being weird.

Voice one just drones on but the LED does not work… I know it is good because I’ve swapped SEMs and it’ll work when it is in the 2nd Voice slot.

Voice two will track normal when It’s switched to “Two Voice” Mode.

Both voices work from the Mini Sequencer, though the LED of SEM in slot one will not light up. ( even though it makes a sound)

I’m thinking there is an issue with the VCA - “On /External” switch or something with the Portamento / Transpose / 2 Voice control board.

Has anyone had problems like this?