I might be missing something that you know about? Is this 110 AC powered or 12 volt?
I find some hints of things but not knowing the RV, leaves me guessing too much! Does your TV with the problem look like this ?
Click these to get a better view or go direct to this drawing if it is 110 AC powered:
https://www.winnebago.com/Files/File...ire_175978.pdf
Part of the question is that there are different options on TV for your year and model! 21R or 21W? Butboth may work on the same breaker and run through the inverter, so this "may" be corrrect but needs checking! Looking at drawings often needs looking at things in person as well!
Maybe the breaker or possibly a switch or breaker/fuse on the inverter?
__________________
Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!