Since watching TV while moving is against the law in most areas, your dealer may not fix this for you. However, a good dealer might point to the wire so you can cut it yourself. Once you get your rig and the kids are watching TV as you drive, be sure to pull blinds so law enforcement won't see the TV on as you pass.
To enable the electric socket while driving, first locate the socket the TV is plugged into by following the power wire. This socket will be under the counter near the TV and you may have to remove a drawer or two to get to it. This socket will have a normal romex (white coated set of power wires) that carry power to the socket. There will be a second romex from the inverter. There will also be TWO separate 16ga wires that carry a 12v dc signal from the ign. switch. All these wires will be going into the socket where TV is plugged.
All you need to do is disconnect or simply cut the two 12v wires so the ign. switch signal does not reach the socket. Do this with ign. switch in off position and no power will be present as you work.
Plug the new DVD player into this same socket after you modify it. Connect the DVD player to TV with a HDMI wire. The TV will have one or two extra places you can connect a HDMI wire.
To watch TV while moving after the mod you just turn on the inverter and go. The TV and DVD player will have power as you drive so no generator or shore power needed!
To further explain - - the socket Jayco put in your coach for the TV is equipped with a 12v dc solenoid that pulls the 120v ac circuit open when the ign. switch supplies a 12v signal to it. What you are doing with this mod is removing the wires that supply the "kill" signal so socket stays connected to the inverter at all times. Other than maintaining constant, uninterrupted power to the TV socket, no other items are effected with this mod.
2015 Jayco Precept 35UN
Towing JEEP TJ with Roadmaster plates and bar w/Blue Ox Patriot brake
an Aluma low bed trailer with HD Road King and/or Polaris RZR onboard