I bought a new ATV to replace the previous generation on in our living room and ran into the remote not working problem on our Sonos sound bar. The new remote navigated the ATV just fine, but lost the ability to control the sound. I tried teaching the Sonos, but it refused. I tried teaching the new remote from the old remote in ATV Settings to no avail. The old remote still worked with the volume, but couldn't navigate the new ATV menus.
I found an article online that was the solution for me. Holding the TV button and volume-down button for 5 seconds. If I had to guess, this procedure resets the IR function in the latest remote.
I found an article online that was the solution for me. Holding the TV button and volume-down button for 5 seconds. If I had to guess, this procedure resets the IR function in the latest remote.