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Sonos AMP HDMI Arc switching back to TV speakers automatically after 3-5 seconds

  • December 14, 2019
  • 4 replies
  • 3914 views
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I have a new Samsung Frame TV connected via HDMI ARC to a Sonos AMP.  Working perfectly until a few days ago. The system now is automatically switching off of the HDMI input and reverting back to the TV internal speakers… If I interact with the volume slider in the Sonos app it will switch back to the HDMI connection to the AMP, but then reverts back again to TV internal speakers after a few seconds. 

The TV audio input settings look correct, the Sonos system plays back music just fine and is connected to the Sonos app...  Any ideas?

 

 

Best answer by Airgetlam

Sounds like an HDMI-CEC sync issue. Check for updates for the TV’s OS, and try a power cycle of the TV by unplugging it from the wall for a couple of minutes. 
 

Might be worth re-seating the HDMI cables, or even trying another cable, on the offhand chance that the one you’re using is loose enough to lose temporary connection on the necessary pins, when a butterfly on the other side of the world beats its wings. Perhaps an exaggeration, but I did have an issue one time where trucks driving by would cause an issue on my TV.  Replacing the cable did wonders, and I had a spare cable lying around anyway. 

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    4 replies

    Airgetlam
    • Airgetlam
    • Answer
    • December 14, 2019

    Sounds like an HDMI-CEC sync issue. Check for updates for the TV’s OS, and try a power cycle of the TV by unplugging it from the wall for a couple of minutes. 
     

    Might be worth re-seating the HDMI cables, or even trying another cable, on the offhand chance that the one you’re using is loose enough to lose temporary connection on the necessary pins, when a butterfly on the other side of the world beats its wings. Perhaps an exaggeration, but I did have an issue one time where trucks driving by would cause an issue on my TV.  Replacing the cable did wonders, and I had a spare cable lying around anyway. 

    Bruce
    S
    • soundlab
    • Author
    • Contributor I
    • December 14, 2019

    Definitely some kind of butterfly effect!  I re-seated the HDMI cable at the AMP side and we’re back to face melting audio.  Thanks for the assist, this was driving me nuts.  :sunglasses:

    Airgetlam
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    • ChrisWe
    • Lyricist I
    • February 10, 2020

    I have the same issue with the same Samsung Frame TV. If I reboot the cable box, the Sonos Amp connects and TV sound is awesome. When I adjust the app, or turn the TV off, the sound connection is broken until I reboot the cable box again… Someone suggested getting a newer HDMI cable to solve the problem. Any thoughts?

     

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    • hitmouse
    • Avid Contributor I
    • November 9, 2020

    I've had long-running problems with an LG C9 TV connected via HDMI ARC. The TV reports a sequence of errors on screen

    "Wired connection lost” (TV reverts to internal speakers)

    "Wired connection found

    "SONOS now available” (SONOS connected-speakers get audio again)

    This happens many times a day, irrespective of TV.

    I have replaced the HDMI cable with one with a higher spec 2.1 cable..

    I have tried disconnecting all other TV sources. 

    I have had the same problem previously with an LG C7 TV.

     

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