Contributor II

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LG OLEDG4 not recognising sonos Arc Earc

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Hi all. I had an LGOLEDB9 with my Arc connected and all was good. I upgraded to an LGOLEDG4 and for the life of me I can’t get it to connect to my Arc. I have tried everything suggested on here. Such as removing all other hdmi inputs and powercycling both the tv and the Arc. Tried different hdmi cables. Reset the arc & tv back to factory settings. And still no joy. Tv setup fails to recognise that the hdmi cable is connected. Even tried the optical adapter! Anyone got anything else I could try?? I should also say I’ve had a 2 hr support call with Sonos too.

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AjTrek1Answer

@Flash22333

See the Edit to my last post.

this is actually the second set I’ve had. I returned the 1st one 🤣. Makes me wonder if there is a firmware compatibility issue?

WOW!

Here’s the litmus test. Reconnect your old set. If the Arc works then all good. Get another LG model…if the Arc works…then all good…and we now know there is a firmware and/or CEC implementation error with the LG model that started this post.

On the other hand IF the Arc no longer responds to your old set then there’s a case to be made for a defective Arc.

Moderator edit: Removed instances of the word Ultra prior to marking as Best Answer

Together Everyone Achieves More = T.E.A.M.

Airgetlam

I’d probably call LG support. It seems as though the CEC system isn’t on/recognizing connected devices.

Bruce

AjTrek1

Did you look in the LG sound menu to see if HDMI is selected as the output?

Together Everyone Achieves More = T.E.A.M.

F

Flash22333Author

Contributor II

I’d probably call LG support. It seems as though the CEC system isn’t on/recognizing connected devices.

Spoke to LG support this evening and they said that since the HDMI earc port ie recognising other devices the issue lies with Sonos. Dunno what to do now 😭

Airgetlam

Curious to what Sonos support said. Beyond my and @AjTrek1 ‘s suggestions, and given there have been zero other reports of this behavior, it sure seems like a local issue. Are you using the Sonos HDMI cable?

Bruce

jgatie

Pull the power on the TV from the outlet, let sit for 2 minutes. Then plug it back in. This will force an HDMI handshake.

F

Flash22333Author

Contributor II

Curious to what Sonos support said. Beyond my and @AjTrek1 ‘s suggestions, and given there have been zero other reports of this behavior, it sure seems like a local issue. Are you using the Sonos HDMI cable?

They said to get in touch with the manufacturer as the arc still works on my older lgoled. Just ordered a new Sonos HDMI cable as misplaced the original but been using high end cables

F

Flash22333Author

Contributor II

Pull the power on the TV from the outlet, let sit for 2 minutes. Then plug it back in. This will force an HDMI handshake.

Tried this multiple times with no luck 😔

F

Flash22333Author

Contributor II

Did you look in the LG sound menu to see if HDMI is selected as the output?

One of the 1st things I did

AjTrek1

Try this leave the arc and tv connected via HDMI. Make sure both devices are powered on. Unplug the TV from electrical outlet. Wait 30 to 60 seconds and plugin the TV back into power. See if that allows the Arc to be recognized.

Together Everyone Achieves More = T.E.A.M.

Airgetlam

I have an inherent (seemingly) mistrust of ‘high end’ HDMI cables, particularly, at least in my experience, as they rarely identify which ‘version’ of HDMI they are. For eARC to work, they certainly need to be a later spec, even high speed ‘older’ cables won’t carry the signal. Do yours identify which version of HDMI they are? Most often, I’ve found it printed on the cable itself, or in the original packaging, which I rarely keep.

Bruce

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