there may not be anything wrong with the tv, need more info.
first, is it plugged into a 12v DC round outlet or is it plugged into a normal 110v AC outlet?
second, if it's plugged into a 12v round outlet, is the trailer battery fully charged?
third, if it's plugged into the 110v outlet, is the trailer on shore power? if not, the tv will NOT work, since you need shore power or a generator for the 110v outlets to work.
many new owners don't realize that the 110v outlets do NOT work on battery power.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC