Jim & Di,
It's been a season since I played with the TV's in our coach, but I thought you just needed to make sure the "red light" was on on the antenna amplifier mounted in the A/V cabinet wall.
There is a splitter hidden somewhere in a wall that directs the amplified signal to both TV's. I asked the floor supervisors on a tour of the factory just where the splitter is located, but they didn't know!!!! Someone knows, just not the supervisors or engineers that I met.
Anyway, I don't think you need the 3x3 input/output switch box turned on, but you do need the antenna amplifier on. Then set the TV input source to "antenna".
Also, the amplifier has a spare visible output. That is for still another set. You don't need anything plugged into it, All the connections are (or should be) already made behind the wall.
Try it and let the group know what you find.
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