Don't know if you found your answer but it you look on some of the other forums you will find that probably thousands of the Jensen JRV212T have had the same issue including mine in my almost new rig.
I am amazed at the number of people with the exact same problem and it's been going on for YEARS people! I don't care if I bought a cheaper motorhome or any of this other nonsense. The complete failure of this radio has been now going on for years and companies keep putting them in and Jensen keeps making them. The only ones we're hearing about are those people that are members of these forums. I can only imagine how many of these have failed industry wide. At $500-$900 a pop this is just wrong! THIS PIECE OF **** SHOULD HAVE BEEN RECALLED years ago but instead I get a recall to have my shower door replaced because it will burn too hot?