I have the same player (3800x) and our dog chewed the remote pretty good. We taped it back up, but it recently lost the ability to control the TV.
Figuring that the remote was finally dying, I purchased the RC-AL7R from Amazon. The remote paired fine with the player, but would not allow for TV control. When I realized that I had two remotes paired with the player, I 'forgot' the original remote and re-paired the new one. It finally let me attempt to control the TV, but it never found a code that worked for the TV (scrolled through all choices).
Ultimately, I put new batteries in the old remote and re-paired it to the player. It went right into TV control mode and controlled the TV with the first code.
So my questions are: should the RC-AL7R have been able to control my TV? Am I going to need a whole new stick when it finally falls apart? Please advise,