How to Fix Sonos Arc No Sound
If your Sonos Arc powers on but produces no audio, the cause is usually a TV output setting, HDMI eARC mismatch, muted playback path, or a configuration issue inside the Sonos app.
This guide walks through the most reliable fixes so you can isolate the problem quickly and get sound back.
The Sonos Arc is designed to work with modern TVs through HDMI ARC or eARC, which means a small settings change on either device can stop audio entirely.
The good news is that most no-sound problems can be resolved without replacing hardware.
Check the obvious audio controls first
Before changing advanced settings, verify that the basic controls are not preventing audio from reaching the soundbar.
- Increase the TV volume and confirm it is not muted.
- Open the Sonos app and make sure the Arc is not grouped with a silent room.
- Check whether volume limiting, night mode, or speech enhancement settings are affecting output.
- Confirm the Arc is selected as the active playback device in the app, streaming service, or TV audio menu.
If the Sonos Arc responds in the app but still plays no sound, the issue is likely upstream from the speaker itself.
Verify the HDMI ARC or eARC connection
The most common reason for how to fix Sonos Arc no sound is a bad or incomplete HDMI ARC connection.
The Arc must be connected to the TV’s HDMI port labeled ARC or eARC, not a standard HDMI input.
Inspect the physical cable
- Use the original Sonos HDMI cable or a certified high-speed HDMI cable.
- Remove the cable and reseat both ends firmly.
- Replace any damaged, bent, or loose cable.
- Make sure the HDMI cable is connected directly to the TV, not through a switch, splitter, or unsupported adapter.
Confirm the correct TV port
Many TVs have multiple HDMI ports, but only one supports ARC or eARC.
Check the TV manual or on-screen labels and move the cable if necessary.
If the soundbar is connected to the wrong port, you may see video but hear nothing.
Check the TV audio output settings
Even when the cable is connected correctly, the TV may still be sending audio to internal speakers instead of the Sonos Arc.
This is especially common after a firmware update or factory reset.
- Set the TV speaker output to HDMI ARC, external speakers, or receiver.
- Enable ARC or eARC in the TV sound settings if the option exists.
- Turn off TV speakers if the set allows only one active output.
- Set digital audio output to Auto, Pass-Through, or Bitstream when available.
Some TVs default to Dolby Digital Plus or multichannel formats that older firmware or misconfigured settings may not handle well.
If you still get no sound, temporarily change the output to PCM to test whether the issue is format-related.
Test different audio formats
Audio format incompatibility can silence the Sonos Arc even when everything is connected properly.
This happens most often with TVs, streaming devices, and game consoles that are set to an unsupported surround format.
Try PCM for troubleshooting
PCM is often the simplest format to test because it reduces complexity.
If sound returns in PCM, the problem may be with Dolby settings, eARC negotiation, or the source device’s audio output configuration.
Review source device settings
- On a streaming device, set audio output to stereo or Dolby Digital instead of automatic surround.
- On a game console, check whether the output is set to linear PCM, bitstream, or Dolby Atmos.
- On a cable box or media player, disable any “enhanced” or proprietary audio modes temporarily.
Once sound is restored, reintroduce advanced formats one at a time to identify the exact cause.
Restart the TV, Sonos Arc, and source devices
A full power cycle often clears HDMI handshake problems and audio-routing glitches.
This is one of the fastest ways to resolve a Sonos Arc that suddenly stops producing sound.
- Turn off the TV and unplug it from power.
- Unplug the Sonos Arc from power for at least 10 seconds.
- Unplug any source device, such as a streaming box or game console.
- Reconnect the TV first, then the Arc, then the source device.
- Power on the TV and test audio again.
Restarting in this order gives the HDMI ARC or eARC connection a clean handshake, which can restore sound immediately.
Update firmware and app software
Outdated firmware can cause compatibility problems between the Sonos Arc and the TV.
Keeping both devices current reduces audio dropouts and no-sound issues.
- Open the Sonos app and check for system updates.
- Update the TV firmware through its settings menu.
- Update any connected streaming device or console.
- Restart after updating so changes fully apply.
Sonos frequently refines HDMI and TV compatibility, so a firmware update can solve problems that seem hardware-related.
Run Sonos Arc setup checks in the app
The Sonos app provides useful diagnostics that can confirm whether the Arc is properly linked to the TV.
If the app cannot detect TV audio, the issue may be in the connection path rather than the speaker output.
What to look for in the Sonos app
- Confirm the Arc appears online and assigned to the correct room.
- Check the TV audio source status inside the system.
- Re-run TV setup if the app indicates a connection or format issue.
- Review any alerts about unsupported audio or missing signal.
If the app reports that TV audio is present but you still hear nothing, the problem may be with the television’s output configuration or the cable path.
Rule out problems with external devices
Sometimes the Sonos Arc is working correctly, but the connected source device is not sending sound.
This is common with Apple TV, Roku, Fire TV, PlayStation, Xbox, and cable boxes.
- Test the TV’s built-in apps to see whether internal streaming audio works.
- Switch to a different HDMI source and compare behavior.
- Disconnect all external devices except one and retest.
- Use the TV’s native apps to determine whether the issue is in the TV or the source box.
If TV apps play sound through the Arc but an external device does not, focus on that device’s audio settings, not the soundbar.
Check for TV settings that block ARC audio
Several TV features can interfere with ARC or eARC output.
These settings vary by brand, but they commonly affect Sonos systems.
- Disable CEC-related options only if troubleshooting requires it, then re-enable later.
- Turn off simultaneous TV speaker output when possible.
- Check for sound mode changes such as game mode, voice enhancement, or wireless speaker pairing.
- Look for eARC compatibility toggles if your TV menu includes them.
On some models, CEC must be enabled for ARC audio to function properly, so toggling it off is usually only a temporary diagnostic step.
When to reset or reconnect the Sonos Arc
If none of the standard checks work, you may need to remove and re-add the Arc in the Sonos app or perform a factory reset as a last resort.
Because resets remove local configuration data, use them only after checking cables, outputs, and firmware.
- Remove the Arc from the Sonos app and set it up again.
- Reboot the router if the app has trouble finding the speaker.
- Use factory reset only if Sonos support or setup instructions recommend it.
Before resetting, take note of your room name, speaker groups, and any home theater settings so setup is easier afterward.
Signs the problem may be hardware-related
Most no-sound cases are software or settings related, but hardware failure is possible if the Arc never produces audio under any condition.
- No sound from TV apps, external inputs, or Sonos music playback.
- The Arc does not respond normally in the app after restarting and updating.
- Multiple known-good HDMI cables and TV ports fail.
- Power cycling and setup checks make no difference.
If these symptoms persist, contact Sonos Support or your TV manufacturer.
The issue could involve the HDMI port, internal amplifier, or a compatibility fault that requires deeper diagnosis.
Quick checklist for fixing Sonos Arc no sound
- Confirm the TV is not muted and the Arc is selected.
- Use the correct HDMI ARC or eARC port.
- Check TV speaker output and digital audio format.
- Test PCM, Dolby Digital, or Pass-Through settings.
- Restart the TV, Arc, and source devices.
- Update Sonos, TV, and source firmware.
- Test built-in TV apps and external sources separately.
Working through these steps in order usually identifies the cause of how to fix Sonos Arc no sound without unnecessary guesswork.