Beam keeps playing after tv is off

  • 4 January 2019
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34 replies

Ken_Griffiths

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.

Ken_Griffiths

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.

A

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

Ken_Griffiths

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.

A

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.

Ken_Griffiths

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.

If you have other peripherals connected to the TV, I would see if the problem persists when you disconnect their HDMI leads from the TV … if it stops the issue, then find which connected box is causing the problem and see if disabling its HDMI-CEC control fixes the issue. 
 

Note: Some devices do not have options to switch off HDMI-CEC in their settings in which case you may need to look to a CEC-less adapter, as shown in this link (just an example):

https://www.amazon.com/Lindy-HDMI-Adapter-Female-41232/dp/B00DL48KVI

If none of the things work however, I would contact the LG support desk and explain/describe the issue to Staff there and see if they are aware and maybe plan to fix it in a firmware update, or see what they can suggest.
 

Hope you manage to get the matter resolved. 

A

One last question, if I changed to optical and this solved the issue - is that a sensible route to take or would I be losing out on other functionality or quality of sound?

 

Ken_Griffiths

One last question, if I changed to optical and this solved the issue - is that a sensible route to take or would I be losing out on other functionality or quality of sound?

 

You should not lose audio quality, but you will lose the HDMI-CEC controls. So Alexa/Google Assistant, for example, will not be able switch on/off your TV, or adjust volume etc; using voice instructions via the Sonos ‘Skill‘. Otherwise I think that’s one solution you could choose. 

D
Userlevel 1

I've recently connected my Beam to my LG TV and I have the same issue. Sound from the Beam stops when the TV is powered off then resumes after 2 seconds and continues for an arbitrary period of time.

I guess it's not harmful - just annoying - but if anyone has a solution I'd be keen to hear!

My TV is an LG OLED65B8SLC.

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