Quick Summary Sonos Beam producing no sound from the TV is almost always an HDMI ARC handshake problem or a TV audio output setting that hasn't been switched t…
Quick Summary
Sonos Beam producing no sound from the TV is almost always an HDMI ARC handshake problem or a TV audio output setting that hasn't been switched to the Beam. The Beam connects via HDMI ARC (or optical adapter on older TVs) and requires the TV to route audio through that connection. The two most common fixes are: enabling CEC on the TV (so the Beam and TV can communicate), and setting the TV audio output to HDMI ARC or External Speaker.
Symptom Diagnosis
Step 1: Set TV Audio Output to HDMI ARC
This is the most common cause. The TV defaults to its built-in speakers and needs to be told to use the Beam. Go to your TV's Settings → Sound → Sound Output (exact menu name varies by brand). Samsung: Settings → Sound → Sound Output → select Receiver (HDMI) LG: Settings → Sound → Sound Out → select HDMI ARC Sony: Settings → Display & Sound → Audio Output → select ARC Vizio: Menu → Audio → TV Speakers → set to Off (forces audio to HDMI ARC) After changing: test TV audio. The Beam should play sound within 5 seconds.
Step 2: Enable CEC on the TV
CEC (Consumer Electronics Control) allows the TV and Beam to communicate over HDMI. Without it, the TV won't route audio to the Beam automatically. Samsung: Settings → General → External Device Manager → Anynet+ (HDMI-CEC) → On LG: Settings → General → HDMI Settings → SIMPLINK (HDMI-CEC) → On Sony: Settings → Device Preferences → Inputs → Bravia Sync → On Vizio: Menu → System → CEC → On After enabling CEC: restart the TV and Beam (unplug both for 30 seconds). Test TV audio.
Step 3: Fix Dolby Atmos / DTS Passthrough Conflicts
Some TV apps (Netflix, Disney+) output Dolby Atmos, which can conflict with older Beam models (Gen 1 doesn't support Atmos). Go to TV Settings → Sound → Audio Format or Digital Audio Output. Change from Auto or Dolby Atmos to PCM or Dolby Digital. Test audio. If sound returns, the issue is Atmos passthrough. Sonos Beam Gen 2 supports Dolby Atmos; Gen 1 does not. If you have Gen 1, keep audio format set to PCM or Dolby Digital.
Step 4: Check and Replace the HDMI Cable
A faulty HDMI cable can cause intermittent or no audio. Disconnect the HDMI cable from both the Beam and the TV's ARC port. Inspect for bent pins or damage. Reconnect firmly — the cable should click into place. Try a different HDMI port on the TV (use the port labeled 'ARC' or 'eARC'). If possible, replace with a certified High Speed HDMI cable. After reconnecting: restart the TV and Beam.
Step 5: Re-run Sonos Beam Setup
If the above steps don't work, re-run the Beam setup to reset the HDMI connection. Sonos app → Settings → System → select the Beam → Room Settings → TV Setup. Follow the on-screen prompts to re-configure the HDMI ARC connection. The setup wizard will test the connection and guide you through any TV settings changes needed.
Step 6: Factory Reset the Beam
If nothing else works, factory reset the Beam. Press and hold the Join button on the back of the Beam for 5 seconds. The LED will flash orange. Release. The Beam will reboot into setup mode. Re-add via Sonos app → + → Add Speaker. Re-run TV Setup after adding.