My Series 3 died so just purchased a new Roamio. I can not get the Roamio remote to operate my JVC TV - tried all five codes and cycled/scanned through all the rest. Odd thing is my Series 3 remote worked fine, and still does, and thankfully operates the Roamio just fine. In looking at the two remotes, the only differences I see is the A, B, C and D buttons, Back and Zoom, which at this point I don't know what they do. Any ideas on how I can get the Roamio remote to work with this JVC TV? Does the Series 3 remote provide any clues on what the code may be?