If all else fails do what I did - save yourself a lot of heartache and buy a DVD player at Walmart and use it instead. I am on my second RV. The DVD player in the first one gave out after 2 years. I have never even tried the DVD player in the second one as I have a "smart" DVD player that I hook directly to the TV via HDMI and enjoy that way. I have found that RV sound systems/all in one units are outrageously expensive and cheaply made. For instance, the replacement cost for my Concertone Genesis 3.0 is around $600.00. I paid less than $500.00 for my Sony 5.1 entertainment system at my house that is a lot more powerful and has more features than the one in the RV.