When a Sonos Arc has no sound, the problem is often smaller than it seems, but the fix depends on where the audio chain is breaking.
This guide walks through the most common causes, from HDMI eARC settings to mute states and app configuration, so you can isolate the issue quickly.
Why a Sonos Arc has no sound
The Sonos Arc is designed to receive audio from a TV through HDMI eARC or ARC, then process that signal into Dolby Atmos, stereo, or surround playback.
If the soundbar is powered on but silent, the issue usually falls into one of four categories: TV output settings, HDMI connection problems, Sonos app or network issues, or a muted/incorrect source.
Because the Arc depends on your television and connected devices for the audio handoff, even a small setting change on the TV, streaming box, or HDMI cable can stop sound from reaching the speaker.
Check the basics first
Before changing advanced settings, confirm the simple items that frequently cause a Sonos Arc no sound complaint.
- Make sure the Arc has power and the status light is on.
- Check that the TV volume is not muted.
- Verify the Sonos app volume is not at minimum.
- Confirm the TV is set to use external speakers or HDMI ARC/eARC output.
- Ensure the correct input source is selected on the TV or streaming device.
If the Arc is connected to a TV, the TV should be the first place you check.
Many televisions default back to internal speakers after updates, power loss, or HDMI reconnection.
Confirm the HDMI ARC or eARC connection
Sonos Arc requires an HDMI ARC or eARC port on the television for audio playback.
A standard HDMI port will not deliver sound to the Arc unless the TV specifically supports ARC on that port.
What to inspect on the cable
- Use the HDMI cable that came with the Sonos Arc or a certified high-speed HDMI cable.
- Make sure the cable is fully seated in both the TV and the soundbar.
- Check for bent pins, fraying, or loose connectors.
- Try a different HDMI cable if the current one looks worn.
If your TV has multiple HDMI ports, verify that the Arc is connected to the port labeled ARC or eARC.
On many televisions, that label is printed beside the port or listed in the user manual.
Adjust TV audio settings
Incorrect TV audio settings are among the most common reasons a Sonos Arc has no sound.
The TV must be configured to send audio externally, and in some cases it must output a compatible format.
Settings to review
- Speaker output: set to external speakers, audio system, or HDMI ARC.
- Digital audio output format: choose Auto, Pass Through, or PCM if supported.
- eARC: enable it if your TV and Arc both support it.
- TV speakers: disable internal speakers if the TV is not switching automatically.
- CEC control: enable HDMI-CEC, which may appear as Anynet+, Simplink, Bravia Sync, VIERA Link, or EasyLink.
Some TVs handle Dolby Digital, Dolby Digital Plus, and Dolby Atmos differently.
If the soundbar remains silent after a format change, switch the audio output format to PCM temporarily to test whether the problem is format compatibility rather than hardware failure.
Check the Sonos app and room setup
The Sonos app is useful for verifying whether the Arc is online, grouped correctly, and assigned to the right room.
A configuration issue in the app can make the soundbar appear connected while still producing no sound.
Look for these app-related issues
- The Arc may be assigned to the wrong room.
- The soundbar may be grouped with another room that is muted or paused.
- TV Autoplay may not be triggering correctly.
- System updates may be pending.
- Network instability may be affecting control, though TV audio still depends mainly on HDMI.
If music plays through the Arc but TV audio does not, the issue is more likely related to the TV input path than to the speaker itself.
Restart the TV, Arc, and source devices
A proper restart clears temporary handshake problems between the TV, Sonos Arc, and any connected devices such as an Apple TV, Roku, Fire TV Stick, PlayStation 5, or Xbox.
HDMI handshakes are a frequent source of silent audio after updates or input switching.
Use this order for a clean restart:
- Turn off the TV and source device.
- Unplug the Sonos Arc and the TV from power for 30 seconds.
- Reconnect and power on the TV first.
- Then power on the source device.
- Finally, wake or reopen the Sonos app if needed.
After rebooting, test both live TV and a streaming app to see whether the issue is limited to one input or affects all audio sources.
Test a different input or content source
If the Sonos Arc has no sound only on one device, the problem may be with that source rather than the soundbar.
Set-top boxes, game consoles, and streaming devices each handle audio output differently.
Examples of source-specific problems
- A streaming device may be set to output Dolby Atmos to a TV that cannot pass it correctly.
- A game console may be configured for bitstream output that the TV does not support.
- An app inside the TV may send audio correctly while HDMI input audio does not.
- A live TV app may be muted by the broadcast or set-top box.
To isolate the problem, test the Arc with a built-in TV app, then with an external device, and finally with another HDMI input if available.
Rule out mute, grouping, and volume control issues
Sometimes the Arc is working, but the audio is effectively hidden by volume or grouping settings.
This is especially common if you use multiple Sonos speakers or voice assistants.
- Increase volume from the TV remote and the Sonos app.
- Check whether the Arc is grouped with another room at a lower level.
- Look for a pause state in the active app.
- Test with different remotes to confirm volume commands are reaching the soundbar.
If you use Alexa or Google Assistant, make sure the speaker is not responding to voice commands while the TV input remains quiet, which can indicate a source-specific issue rather than a total failure.
When to run a Sonos update
Software updates can resolve compatibility bugs involving Dolby Atmos, HDMI ARC, and television control behavior.
If the Sonos app shows an update is available, install it before proceeding to more invasive troubleshooting.
Also check the TV firmware.
Manufacturers such as Samsung, LG, Sony, TCL, and Vizio frequently release updates that affect HDMI-CEC behavior and audio passthrough.
A TV update can restore sound after a previously working setup stops outputting audio.
When a reset makes sense
A factory reset should be a last resort, not the first move.
It removes the soundbar’s configuration and requires re-adding it to the Sonos system, so use it only after you have tested cables, ports, settings, and restarts.
Consider a reset if:
- The Arc has no sound on any source, even after trying another cable.
- The Sonos app cannot reliably detect the soundbar.
- The speaker remains stuck after firmware updates or repeated power cycles.
- TV audio worked before but failed after a major system change.
Before resetting, note your room name, speaker groups, and any custom settings so you can restore them afterward.
When the problem may be hardware-related
If the Sonos Arc still has no sound after verifying the HDMI path, TV output settings, updates, and restarts, the issue may involve the soundbar hardware or the TV’s HDMI ARC port.
A failing HDMI port, damaged mainboard, or internal audio processing fault can prevent playback even when the system appears connected.
Signs that point toward hardware include:
- No sound from any source, including the Sonos app and TV audio.
- The Arc powers on but never plays test tones or system audio.
- Repeated HDMI handshakes fail with multiple cables.
- Other ARC devices do not work on the same TV port.
At that stage, contacting Sonos Support or your TV manufacturer is usually the fastest path forward, because the issue may sit in the TV’s ARC/eARC port rather than the soundbar itself.
Quick troubleshooting checklist for Sonos Arc no sound
- Confirm power, volume, and mute status.
- Verify HDMI is connected to the TV’s ARC or eARC port.
- Check TV speakers, digital audio output, and HDMI-CEC settings.
- Restart the TV, Arc, and source devices.
- Test another HDMI cable and another content source.
- Update the Sonos app, soundbar, and TV firmware.
- Use PCM temporarily to test audio format compatibility.
- Escalate to reset or support if all sources remain silent.
Following this sequence usually identifies the cause of a Sonos Arc no sound issue without guesswork, and it helps separate a simple HDMI setting from a true hardware fault.