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Answered

Sonos Arc Solid White Light

  • September 22, 2026
  • 6 replies
  • 44 views

For about the last week both of my Sonos arc soundbars have a white light when the TV (on one and projector on the other) is turned off and then won't connect to the TV/projector until the power is pulled from the soundbar. Assuming this is an update issue as both soundbars started doing it on the same day?

Best answer by Airgetlam

Just as a note, this behavior did not happen to either of my Arcs, so it does sound like a local, not software update issue. 

6 replies

AjTrek1
  • September 22, 2026

Check the article in the link. However, to be honest what you describe points to something else. I suggest you run a diagnostic within 10 minutes of the next occurrence and make note of the reference ID. Do not post it in the community. Call Sonos tech support to discuss the results. Do not factory reset your speakers.

If you think it’s an update issue have you checked for updates via the app?

https://support.sonos.com/en-us/article/sonos-led-lights

 


  • Lyricist II
  • September 22, 2026

Since both Arc soundbars started showing the same behavior around the same time, it does sound like something may have changed recently, possibly a software or firmware update. I’d also check for any recent Sonos app or TV/projector updates and try rebooting the network before doing a factory reset. Hopefully Sonos can confirm whether this is a kno


Stanley_4
  • Grand Maestro
  • September 22, 2026

Maybe an update confused something internal.

Try an easy fix first, disconnect the HDMI cable.

Unplug the TV and Arc from power for two minutes.Not the power switch, you need it fully unpowered, not just in standby.

Power up the TV and Arc.

Once both are fully operational reconnect the HDMI cable.


Stanley_4
  • Grand Maestro
  • September 22, 2026

Since both Arc soundbars started showing the same behavior around the same time, it does sound like something may have changed recently, possibly a software or firmware update. I’d also check for any recent Sonos app or TV/projector updates and try rebooting the network before doing a factory reset. Hopefully Sonos can confirm whether this is a kno

Do not do a factory reset!

Sonos does not recommend doing that until after you have talked to support as it destroys important diagnostic data.


AjTrek1
  • September 22, 2026

Once again DO NOT factory reset your speakers as it will destroy any use full information in the diagnostic. Only do so when instructed by Sonos tech support. The odds of both the TV and projector experiencing an update at the same time are slim but not impossible.

To perform a proper network reboot follow the steps below in order:

  1. Unplug all Sonos
  2. Reboot router and let it come back
  3. Delete the Sonos App in your device
  4. Reboot your device and connect to wifi
  5. Plug in Sonos units and let them come back
  6. Re- install the Sonos app
  7. Select join existing system
  8. Follow prompts and sign-in with your credentials
  9. Test Sonos by performing power on/off/on of TV and projector

Airgetlam
  • Answer
  • September 22, 2026

Just as a note, this behavior did not happen to either of my Arcs, so it does sound like a local, not software update issue.