Thanks for the reply, wahoonc. There is an external outlet on the side of the coach that is between the GFCI and the TV, that works, but could have a bad output side. It is sealed to the side of the coach, and I haven't yet found a way to get into it without damaging the paint.
I corresponded with Nate Hedges at Coachmen. He sent drawings and trouble-shooting advice, and affirmed that the TV is held in place by those two screws. I'll probably remove it next, and most likely will remount the outlet onto the half-wall (like it should have been to start with). This may have to wait for another day, since I need to get it back to storage today.
2013 Coachmen Mirada 35DL
Chuck, Susan, and dogs- Gracie the Registered SnackHound and Toby the Wonder Boxer