If your Sonos Arc is not connecting to your TV, the issue is usually tied to HDMI ARC/eARC settings, cable problems, or TV audio output configuration.
This guide walks through the most reliable fixes so you can identify the cause quickly and get sound working again.
Why the Sonos Arc may not connect to a TV
The Sonos Arc depends on HDMI ARC or HDMI eARC to receive audio from a television.
That means the soundbar is not just a speaker, but part of an audio handoff between the TV and the Arc using CEC control and HDMI return audio.
When the connection fails, the problem is often one of the following:
- HDMI cable is not rated for ARC/eARC or is damaged
- The TV is connected to the wrong HDMI port
- HDMI-CEC is disabled on the television
- TV audio output is set to internal speakers or optical instead of ARC/eARC
- Firmware on the TV or Sonos app is outdated
- The television does not fully support eARC, or requires manual audio settings
Confirm the correct physical setup
The Sonos Arc should connect directly to the TV’s HDMI ARC or HDMI eARC port using the included HDMI cable or a high-quality HDMI cable that supports ARC.
If your TV has multiple HDMI inputs, only one is usually marked ARC or eARC.
- Plug the Arc into the HDMI port labeled ARC or eARC
- Avoid using HDMI splitters, switchers, or AV receivers during troubleshooting
- Use the Sonos-supplied HDMI cable if possible
- If the cable is long or older, replace it with a certified high-speed HDMI cable
If the TV only has optical audio, the Arc will not connect natively through optical.
In that case, check whether your setup includes a compatible adapter or whether a different soundbar is better suited to the TV.
Check the TV’s HDMI ARC and CEC settings
For the Sonos Arc to work properly, the TV must send audio through ARC or eARC and allow device control through HDMI-CEC.
Different manufacturers label CEC differently, so the setting may appear under names such as Anynet+ on Samsung, Simplink on LG, Bravia Sync on Sony, or VIERA Link on Panasonic.
Open the TV settings menu and verify the following:
- HDMI-CEC is enabled
- HDMI ARC or eARC is enabled
- TV speakers are not forced to “On”
- Digital audio output is set to Auto, Passthrough, or Bitstream where available
Some TVs require a restart after changing these settings.
If the Sonos Arc still does not connect, power cycle both devices after saving the changes.
How to fix Sonos Arc not connecting to TV by power cycling everything
A complete restart clears temporary handshake issues between the TV, the Arc, and the HDMI connection.
This is one of the simplest and most effective fixes for audio handshake failures.
- Turn off the TV and unplug it from power.
- Unplug the Sonos Arc from power for at least 30 seconds.
- Disconnect the HDMI cable from both devices.
- Plug the TV back in and turn it on first.
- Reconnect the Sonos Arc, then reconnect the HDMI cable.
- Wait for the TV to fully boot before testing audio.
This sequence helps the TV detect the Arc again and renegotiate HDMI ARC or eARC properly.
Verify the Sonos app and system status
The Sonos app is useful for confirming whether the Arc is properly detected and whether the TV input is configured correctly.
Open the app and check the room settings for the Arc.
- Ensure the Arc appears online in the Sonos system
- Run any available Sonos software update
- Check for messages related to TV setup or audio detection
- Review the TV input setup if the app prompts for it
If the Arc is visible in the app but no TV sound plays, the issue is more likely on the TV side than with the speaker itself.
Test the HDMI cable and port
HDMI cables can fail internally or lose compatibility over time, especially if they are bent frequently or were not designed for ARC/eARC traffic.
A bad HDMI cable can still transmit video in some setups while failing to carry audio return properly.
To test this:
- Swap in a new certified HDMI cable
- Try another ARC/eARC-capable HDMI port if your TV supports more than one
- Inspect the cable ends for loose connectors or debris
If the cable works with another device but not the Arc, the issue may be the TV’s HDMI port or audio settings rather than the cable itself.
Update TV firmware and Sonos software
Manufacturers regularly release firmware fixes for HDMI handshake behavior, CEC compatibility, and eARC stability.
A TV update can resolve issues with brands such as Samsung, LG, Sony, TCL, Hisense, and Vizio, especially after a major software refresh.
Check for updates in two places:
- TV firmware in the television’s settings menu
- Sonos system updates in the Sonos app
After updating, restart both devices and test the connection again.
This is especially important if the problem began after a recent TV update or app change.
Adjust audio output settings on the TV
Some TVs default to internal speakers or a format that the Sonos Arc cannot negotiate correctly.
Set the audio output to the option intended for external sound systems.
Look for settings such as:
- Audio Output: HDMI ARC, Receiver, or External Speakers
- Digital Audio Out: Auto or Bitstream
- eARC Mode: Auto or On
- Pass-Through: Enabled, if available
If you are using Dolby Atmos content, eARC is usually preferred because it supports higher-bandwidth audio formats.
However, even standard ARC should still deliver stereo and compressed surround audio when configured correctly.
What to do if your TV does not support eARC
Not every TV supports eARC, and many older models only support ARC.
The Sonos Arc can still work with standard ARC, but some formats and features may be limited.
The key is to ensure the TV is actually sending audio over ARC and not relying on a different output path.
If your TV lacks ARC entirely, the Arc cannot connect directly in the normal way.
In that case, you may need a different TV, a compatible audio extractor, or a sound system designed for optical input.
Use the Sonos Arc with a different TV source
Sometimes the problem is not the television itself, but the source device connected to it.
A streaming box, game console, or set-top box may trigger an audio mode that exposes a compatibility issue.
To isolate the issue, test the following:
- TV built-in apps such as Netflix, Disney+, or YouTube
- Another HDMI source, such as a Blu-ray player or game console
- Different audio formats if the source device allows toggling between Dolby Digital, PCM, and Atmos
If built-in apps work but an external device does not, the source device settings may need adjustment.
When the problem is likely hardware-related
If you have checked the cable, port, settings, updates, and power cycle steps, the issue may point to hardware failure in the TV’s HDMI ARC port or the Sonos Arc itself.
Signs of a hardware problem include repeated connection drops, no HDMI detection at all, or failure across multiple compatible TVs.
Before assuming the Arc is faulty, test it on another ARC/eARC-capable television.
If it works there, the original TV is likely the source of the problem.
If it fails on multiple TVs, contact Sonos support for diagnostic help or warranty options.
Most effective troubleshooting order
If you want the fastest path to a fix, use this order:
- Confirm the Arc is on the TV’s ARC/eARC port
- Enable HDMI-CEC and ARC/eARC in the TV settings
- Power cycle the TV and Sonos Arc
- Replace the HDMI cable
- Update TV firmware and Sonos software
- Set TV audio output to Auto, Bitstream, or Passthrough
- Test another source or another TV
Following this sequence helps narrow the issue without changing too many variables at once, which makes the root cause easier to identify.