We purchased two awa brand duel screen DVD kits for our van today.we set all four screens up and tested them.all was good.we went for a drive and the kids watched a movie each.I stopped to fuel up but when I restarted the car there was feed back thru the screens that are run of the lighter socket.we tried everything but to no avail so we hooked one of the sets up to another car.all was good till again we switched the car on and off as the feedback returned. Can anyone offer any ideas as to how this can be fixed or what other in car DVD options I have preferably portable.