Was unable to control my home theater (Bose) volume with my appletv remote. Several posts pointed to appletv settings/remote/volume control. None of these fixes worked but noted home theater control setting was off and greyed. Was unable to change it to on. All my devices CEC were on and connected to home theater via ARC port
One post worked. It stated to disconnect power from all devices including home theater for 5 min then restart. This worked and allowed me to change home theater control to on in appletv settings/remote. Once the theater setting was changed to on the appletv remote now controls the home theater volume
One post worked. It stated to disconnect power from all devices including home theater for 5 min then restart. This worked and allowed me to change home theater control to on in appletv settings/remote. Once the theater setting was changed to on the appletv remote now controls the home theater volume