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Leeharl86
Trending Lyricist I
January 4, 2019

Beam keeps playing after tv is off

Hi all
any ideas
when i turn the tv off with the remote or when i ask alexa to do so, pithing seconds the beam continues to play the tv audio
any ideas why this is?
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Airgetlam
Airgetlam
March 8, 2020

I’d agree with your thought process. Have you contacted LG’s customer service? What did they say?

Bruce
Ken_Griffiths
Ken_Griffiths
March 8, 2020

I still do have the exact same problem with my sonos beam in combination with my LG OLED C8. Both have been updated to the latest firmware. 

Problem: The beam is directly connected too the LG via ARC. When I'm watching satellite TV and switch the TV off, the beam goes silent. After a couple of seconds the beam starts to play the sound from the last channel I watched on the TV while the TV stays black. The sound plays for a couple of seconds to a couple of minutes. After that there is a very loud beep and the beam goes silent. 

Cause: I think the LGs pixel refresh is what causes this behavior. When the LG TV is switched off it will start its pixel refresh program. For some reason the LG outputs sound to the beam while the screen stays black. As stated above the sound is played as long as the pixel refresh takes. 

Solution: Unfortunately there doesn't seem to be one. I searched the internet and tried some stuff myself. So far. Nothing worked. Probably this issue can only be solved by a firmware update from LG…

 

Does anybody have a solution to this problem?

In the TV “settings/sound/sound-out /HDMI-ARC”.. do you have the digital sound/out on the HDMI-ARC Port set to “Pass Through”? .. if so, switch it to Auto instead and see if that solves the issue for you.

Binzi
Lyricist I
March 9, 2020

Thanks for the quick reply. 

For digital sound out I can only choose between "Automatic" and "PCM". I already had it set to automatic. So unfortunately that doesn't solve the problem

    Ken_Griffiths
    Ken_Griffiths
    March 9, 2020

    I take it that switching it to PCM, (just temporary) as a quick test, doesn’t fix it either?

    I have the LG C9 TV and the instructions in my previous post fixes the matter as it’s stops the pass-through of the audio.

    Just to add though that the pass-through of audio on the port is the best option anyway, as otherwise the TV ‘checks’ and where necessary will transcode the audio signal, which can slow down the audio output through the HDMI-ARC port.

    Binzi
    Lyricist I
    March 9, 2020

    I set the digital out from "automatic" to "PCM" and did a couple of tests. Unfortunately the problem still remains. In each test the beam would be playing the sound of the current channel after the LG TV had been shut off. Same behavior as if the digital out was set to "automatic".

    Also the beam only receives a stereo signal when the digital out is set to "PCM". So it wouldn't be a permanent solution even if it worked. 

    Guess I can't do much else than to wait for an LG firmware that fixes this issue. My current workaround is to set the LG TV to mute before I switch it off...

      Airgetlam
      Airgetlam
      March 9, 2020

      Unfortunately, in this manner, the Sonos is a ‘dumb’ device. If it receives a signal on the line in, it plays it. If there is no signal playing, it goes in to ‘low power’ mode after a short period of time. I would certainly hope LG could ‘fix’ this issue in an update relatively soon, since this issue would be across all devices, not just Sonos. 

      Bruce
        alex_herbert
        Lyricist I
        July 8, 2020

        I have a LG OLED B8 with same issues - has anyone managed to find a working solution?

        Ken_Griffiths
        Ken_Griffiths
        July 8, 2020

        I have a LG OLED B8 with same issues - has anyone managed to find a working solution?

        I’m not certain, but this is usually caused by audio pass-through on the HDMI ports, which I know on the later LG C9 TV can be switched off. I think LG may have fixed the matter on the C9 recently with the v04.80.03 firmware update, so perhaps see if there is a similar update for the LG B9. It’s definitely an LG matter rather than a Sonos issue.

          Ken_Griffiths
          Ken_Griffiths
          July 8, 2020

          On the C9 TV the pass-through setting is located within the TV ‘Settings/Sound/Sound Out/HDMI ARC/Digital Sound Out’ so perhaps check the B9 TV to see if the setting is in the same place and if relevant switch it to ‘Auto’, or perhaps some other available setting’ and see if that resolves the audio issue.

          alex_herbert
          Lyricist I
          July 9, 2020

          Thanks Ken - I switched the digital sound out setting from PCM to Auto and checked the firmware (its the latest v05.10.05). Beam turns off with TV and then comes back on for a couple seconds before turning off. Sounds like i’ll probably just have to live with it - haven’t noticed it staying on permanently but duration seems to differ. TV Model is LG OLED65B8SL.

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