I would try and deal directly with the RV MFG. Explain how you fully tested it and they may send a TV directly to you after you explain everything to them. The fact the dealer told you to pound sand for a week or so since he is so busy might have some influence with the MFG. If you explain it fails on cable, over air and DVD I bet they send you one. My RCA was making a buzzing noise when new even after isolating it from the trailer and Jayco sent a new one directly to me. Both StarCraft and now my current Jayco have sent me parts directly. I always try to bypass the dealer. It is also cheaper for the MFG to send directly to you since there is no labor charge. They will pay the dealer more in labor than the TV is worth. Good chance they RV MFG has seen this problem more than once. That was the case with my RCA where many people had the problem. If that is the case they will prefer to handle it directly. JMO