Thank you to all comments on inverter.
Received word from Jayco saying "as a safety feature, tv will not run when engine is on".
How would a tv out of sight of the driver be a safety concern? The driver would have to leave the driver seat to watch the tv.
Anyway, I will locate the wire from the tv that is connect to ignition and disable it. Passengers in the dining area when moving may want to watch a DVD. Seat belts are present outside cab area.
Again, thank you all for sending good advise.
Roadrat