Hello, I have a Scepter U650CV-UMR tv. Although I can control the volume with the DISH remote 52.0, I cannot change the input or anything else for that matter. So to explain in detail, I press the TV button on the side of the 52.0 remote, the "Press SAT to Watch TV" warning immediately comes over the screen, I press the INPUT button on the side of the 52.0 remote, the "Source Select" of the Scepter TV comes on but I cannot move the selection using the directional keys of the 52.0 remote. I have tried all available codes by manually entering codes within the "Pair TV with Remote Control" screen in Settings. I have tried the "TEACH COMMANDS" as well. Nothing seems to work. The inconvenience with this happening is in order to watch the Apple TV, ROKU or Fire TV, I have to bring out the actual TV remote to change the input. Not life threatening but annoying none the less. If anyone has some additional suggestions, I would appreciate them! Thank you!