Sonos ARC keeps losing TV connection and shows Connection Issue

  • 29 June 2020
  • 4 replies

Every time I turn on my TV, the Sonos Arc doesn’t switch to the TV input (it is set to do so automatically). When I try to do this manually in the Sonos S2 app, the following error message shows:

Connection Issue

We’ve detected an issue with your HDMI connection. We’ll help you fix it.

Cancel | Fit it

When I click “Fix it”, the TV connection wizard starts with the following steps:

  1. Please run on your TV è It is on already so I click “My TV is on”
  2. Connecting with HDMI-ARC è Continue
  3. Look for the ARC port on your TV è I found the ARC port
  4. Connect your Arc to ARC è I’m connected to ARC
  5. Connecting… è We are not getting a signal
  6. Try again starts over with step 4 resulting in step 5
  7. Try again, but now I set my TV’s output to HDMI2 (i.e. my HDMI-ARC port). I see the Sonos groovy 50’s lines and when I now click “I’m connected to ARC” the message shows “TV setup complete”
  8. Click done
  9. Set my TV to any source to play some content and the Arc plays music (and the Sonos App shows it’s connected)

But as soon as I turn off my TV and turn it on again, I need to do the same setup process over and over. The fun thing is that it worked flawlessly with my Playbar and Sonos Beam which I had previously with the same TV and rest of the setup.

My TV is a LG OLED 55B6V

Please advise, because this is getting really annoying.


  • 942656442 – TV on, no sound from Sonos Arc, Arc still set to music
  • 1693472006 – TV on, sound is now working.



4 replies

Userlevel 4
Badge +12

Hi @riesm, thank you for reaching out and getting our attention to this.

We understand the frustration and I would like to inform you that we have an on-going investigation on the Arc losing the TV signal.

When I checked the diagnostics, the Arc detects the cable connection on both but the ARC is disabled when the Arc has no sound coming out.

To make sure that this is not a different issue from the one currently under investigation.

Please check the HDMI Cable if there are some creases and if the cable is firmly connected on Both ends. Also, make sure the HDMI connection isn’t strained(e.g. too much pulling or twisting forces).

If the cable is secure and fine, check if the optical connection is more stable than the HDMI. If the Optical connection is fine, your issue is related to the reported issue that is under investigation.

The workaround present, for now, is to reboot both the TV and the Arc by unplugging both from power. Rebooting the TV first before the Arc. 

The option is to use the Optical connection until our Engineers can resolve the issue.

If you have other concerns, feel free to reach out.

Hi Kyle, the problem is resolved and seems to be related to a LG setting. I got this from another message in this forum ( and tried it myself and it works!

  1. Go to Settings
  2. All Settings
  3. General
  4. Quick Start+
  5. Toggle it to “On” (or try a few times)

Somehow that setting also interferes with HDMI-CEC. Anyhow, my Arc now detects sound output and functions like a charm.

Userlevel 4
Badge +12

Hi @riesm, thank you for the update.

I’m glad one of our community users was able to help you with their suggestions.

If you need further assistance, feel free to reach out.

The community is here to help.

I’m having the same issue.  The Sonos Arc worked flawlessly with my 7 year old Vizio.  I recently replaced it with Sony OLED XBR77A9G and ever since I lose audio from the Arc intermittently, especially if I leave it unused for say overnight and come back, no audio.  I have to completely power cycle the TV to get it to work.  

To eliminate the TV being the culprit I put my playbar in the Arcs place attached to the Sony via arc connection with hdmi.  No issues.


I also tried three different hdmi cables.


tried a plethora of sound settings on the Sony TV without luck.


called Sony and they troubleshooted with me for 3 hours and determined it was not the TV output since it worked fine with a different device using hdmi arc.

wondering if this has anything to do with the hdmi version being used and the arc needs a firmware update.


odd that the original poster also had an OLED set—LG makes both panels—for Sony and LG sets.


Sonos Diagnostic Confirmation: 897939381


other devices connected via HDMI:

  • AppleTV 4k
  • FireTV Cube
  • TiVo Stream