Sonos Arc, No sound until reboot

Hi @kyy.

Thanks for reaching out and for your detailed post outlining your concern.

I would be more than glad to assist you and get this figured out.

May I ask the current status of the LED light on the Sonos Arc? Is it still flashing green?

If yes, then it means that the unit is still on the setup mode, you can check it also on this article to know more about Sonos LED Lights.

This article will help you get started with setting up your Sonos Arc.

If that doesn’t help, please submit a diagnostic report, and reply with the confirmation number.

I'd be glad to review your system further and see if there’s anything else causing this issue.

Let us know how it goes and if you have any other questions or run into any issues, please do not hesitate to reach out.

The light is not flashing green.

My note there was that I notice that the light flashes green one time and that seems to indicate when it’s working again. Just a single flash and it happens after I restart my Apple TV or my Sony TV.

My diagnostic report code is 999085382

Thanks for helping with this

It’s happening with my system as well, until reboot the sound doesn’t come through the sound bar 

Hi @kyy.

Thanks for your response and for your effort in submitting the diagnostic.

Upon checking on the diagnostic result, there’s a large sync error detected by the system.

Commonly these issues come as a result of wireless interference, this article will help on how to reduce the interferences around Sonos products.

You may also try to clear any communication errors by following these steps:

• Unplug from power all of your Sonos devices.
• Reboot your router.
• Once the router has come back up, plug back in the Sonos devices, and give it a minute to load properly.
• Then try a test.

If the issue persists, please submit a new diagnostic report, and reply with the confirmation number so I can check if there are any changes.

Let us know how it goes.

Hi @upipp2.

Thanks for reaching out. 

Sorry to hear about the trouble, let me help and get this figured out.

Kindly please submit a diagnostic report through the Sonos app, and reply with the confirmation number.

I'd be glad to review your system further and it will also help in identifying what's causing the issue.

I’m looking forward to assisting you further from here.

If you have any other questions or run into any issues,  please do not hesitate to reach out.

@Annazel S this is diagnostic number 

823730959

The new diagnostic test number is 985564221

Hi @upipp2.

Thanks for your response and for your effort in submitting the diagnostics.

Upon checking on the diagnostic report, your iOS controller is connected to another access point/router, different from where Sonos was set up.

To give you a heads up, if your phone is connected to the other Wifi, you will not see your Sonos system. 

• Kindly verify if you are able to play music from the Sonos app? Is the issue happening only on TV playback?
• I suggest checking for firmware updates on both the TV and the Sonos app. Install any available updates.
• What is the audio format in use on the TV settings?
• Are there any devices connected to the TV as a source of audio like Blu-ray, Apple TV box, cable box, etc.?
• Is it happening on streaming apps on the TV, like Netflix? 
• Kindly try different audio sources from TV and see if it’s the same?
• Try to adjust the audio format within the TV’s Sound or Audio menu. Typically, these settings are located under Digital Audio Format or Audio Output. This setting needs to be changed to one of the audio formats supported by Sonos.

If the issue persists after going through the above suggestions, please submit a new diagnostic report, and reply with the confirmation number.

Let us know how it goes and if you have any other questions or run into any issues, please do not hesitate to reach out.

Hello @Annazel S 

I am able to play music from the phone, the other wifi is just an extender to the same wifi network.

There are no updates on either sonos or my TV, but the problem still persists

The sound from TV without ARC output is fine.

The moment I go to menu > Sound and HDMI ARC output it takes forever trying to connect and it switches back to TV Audio.

Now I have a problem setting up the true play as well 843735696

If this helps 434293893