Hi @Samier,
Welcome to the Sonos Community. Thanks for reaching out to us and letting us know about your concern. Sorry to hear that your remote stopped controlling the volume on your Sonos Arc.
To help you out with this, allow me to ask a few questions.
- Is the HDMI CEC enabled on your TV?
- Have you tried rebooting your Sonos Arc and TV
- Unplug the HDMI cable from the Sonos Arc and the TV.
- Unplug the power cable from your TV, the Sonos Arc, and any connected audio source (such as a cable box or video game console). Wait 30 seconds before you plug them back in.
- Reconnect the HDMI cable to your TV and the Sonos Arc. Inspect the HDMI cable to ensure it’s not bent or kinked and check to see that it’s fully inserted into both devices.
- Have you tried using your TV remote?
Some remotes may show pop-ups on the screen when you change the volume. If you experience this issue you will need to program the remote's volume buttons to control Sonos as a separate audio device, while allowing the rest of the remote to control your TV and cable box. Please refer to your remote or TV’s manual and manufacturer for further help.
Let us know if you have any other questions or run into any issues, please do not hesitate to reach out.