eARC problems with LG CX (Beam and Arc)

  • 19 December 2020
  • 28 replies

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28 replies

Userlevel 5
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Hi @contractcooker, thank you for reaching out to the Sonos community and for letting us know about your concern. We appreciate you for sharing your feedback with us. Disabling the eARC is a workaround to address the audio dropping issues. We have no information to share with you yet when this will be resolved. I would also recommend reaching out to LG for further assistance. Let us know if you need help with any other information, we're here to assist you.

Rowena, thank you for the reply.

I followed the steps you outlined and ran a diagnostic report (confirmation number: 1360637274). It appears that this solves the audio dropping out on the Sonos Arc (haven’t had time to test the beam yet) HOWEVER it is my understanding that in order to enjoy the Dolby Atmos features of the Sonos Arc I need to have eARC enabled on the TV. I really want to be able to utilize my sound bar to it’s maximum potential. The Sonos Arc is not inexpensive and Dolby Atmos support was part of the reason why I decided to purchase it. Disabling eARC is not a very satisfying solution for a product that is supposed to utilize eARC. Again, please let me know if my understanding is incorrect but I believe eARC needs to be enabled for Atmos to function.


EDIT: also just wanted to comment that I have used multiple HDMI cables to rule out the HDMI cable being the problem.

Userlevel 5
Badge +16

Hi @contractcooker,

Welcome to the Sonos community and thanks for bringing this to our attention. Let me share some information to help you out. 

The Sonos Arc can play Dolby Atmos audio. ARC and eARC are protocols responsible for sending audio over an HDMI cable to home theater sound systems like Sonos Arc. Sonos Arc must be connected to HDMI ARC or HDMI eARC to play any Dolby Atmos content. Not all TVs have HDMI ARC or HDMI eARC.The Sonos Beam should be connected to your TV via HDMI ARC, and the HDMI-CEC is enabled. 

Let me suggest the next troubleshooting and see if it works for you.

  1. Unplug the HDMI cable from the Sonos Arc/Beam and the TV. 
  2. Unplug the power cable from your TV, the Sonos Arc/Beam, and any connected audio source (such as a cable box or video game console). Wait 30 seconds before you plug them back in.
  3. Reconnect the HDMI cable directly to your TV and the Sonos Arc/Beam. Inspect the HDMI cable to ensure it’s not bent or kinked and check to see that it’s fully inserted into both devices.
  4. Update the TV’s software (if available)
  5. Disable eARC on the TV.
  6. Adjust the group audio delay - Settings > System > Tap your Sonos Beam > Group Audio Delay and then choose a delay option.
  7. Check for Sonos update - Settings > System > Check for updates.

Let us know how you get on with the advice above and run a diagnostic report. Kindly include the confirmation number in your response for us to check. If you have any questions about this. We and the community are always here to help.