I understand you can change the LG user agreements in your LG account ‘Settings/General/Account Management’ and that will cause the TV to fully reboot, or leave the TV powered off completely for (I think) 10 minutes. 

Sadly it didn’t last and the remote is now not controlling the SONOS again

It sounds like you may perhaps have an intermittent fault somewhere. I would submit a Sonos diagnostic report, both when the remote works and when it doesn’t, and note the two reference numbers. Then contact/chat with Sonos Support Staff via this LINK  and see what the Staff can suggest to resolve the issue. I guess there’s no saying at this stage that the fault may lie with Sonos, it might of course be an issue with the remote infrared, but see if the Staff can perhaps see anything untoward in your diagnostics or see if any other paired IR TV remote has the same intermittent issue.

LG support came back today to tell me that they were unable to determine possible issues and that it should all work fine. They suggested I reset the TV to factory settings again and it may get resolved, but I think it’s all a firmware issue which they have failed to identify.

In any case, I’ll reset the TV and the Playbase again at some point, and see if anything changes.

I don’t personally think you will need to reset the playbase. I would start with the TV - it’s just a real pain to reset any TV as the in-built Apps have to be setup again - that’s something every TV manufacturer needs to fix and make easier for the user.

Have you tried removing the optical connection and switching over to the internal TV speakers for half an hour or so …and rebooting the TV, then see if it lets you add it back and setup the Sonos manufacturer along the way? - I think many LG TV’s have an AV Reset option too, don't they? Have you tried that feature? On many of their TV’s ...it often starts with pressing the ‘mute’ button three times on the Magic Remote, but I’m not sure if it will work for you in this instance, but far easier than a full reset.

I fixed it. Holy *** , I fixed it, after 18 months. It had to do with the Location settings of the TV.

The guy on the phone from LG earlier briefly said that it may be due to the country change, but it didn’t immediately click. By sheer chance, as I was typing my previous post 20 minutes ago, this topic came up on the right side of the screen:

Configure LG OLED Magic Remote (2018) with Playbase | Sonos Community

I had never seen it before, but the poster had the same issue I was having. The solution came by @markymos, who briefly mentioned the LG service country in a post of his, and then @Jools23 confirmed that it worked for him.

So I went to settings, general, location, and changed the location for everything to UK, rather than Greece. I am not sure how that had gotten changed, and if it happened automatically or if the TV asked me at some point.

Now that I’ve changed it back to UK, I get the option to select the manufacturer in the device connector. I set the remote up again, and lo and behold, I can now use my LG magic remote control to control the Playbase’s volume!

Thank you everyone, and especially @Ken_Griffiths who has been suggesting things and coming back to this topic for months.

*Moderator Note: Modified in accordance with the Community Code of Conduct.*

Good job. Glad the solution worked.  

Ah that’s great news @LGRemoteNotWorking - glad to hear that you have managed to sort it.

Hi, I have a LG OLED65G26LA and cannot get the remote to work. It worked on my previous LG but not on the newer model. All steps on sonos support site does not work and talking to Sonia they only run me through those same steps and linking the RF remote. I have now change location in all places to UK and if I understood you correctly you then found Sonos under universal control settings, I however do not, only Samsung and Sony on S or did I misunderstand you. Thankfull for all the help I can get. /Johan

The results for the manufacturer search are based on a case sensitive search so try both ‘Sonos’ and ‘sonos’ one of them should find a result to add their soundbar and setup the universal remote for your TV. 

Resurrecting an old thread as I simply couldn’t get my new LG G3 TV to control my PlayBar. Tried all the methods on all the old threads to no avail. Lots seems to have changed over the years, for example I don’t even have “SIMPLINK” as far as I can tell.

Anyway, maybe not a solution for all… but I happen to run Home Assistant at my place, and using that it’s been straightforward to query the volume-level and mute-status of the TV, and apply it to the soundbar. I’d have never thought to try this but came across a random post ironically while searching for something else!

As I said before, SIMPLINK is LG’s name for CEC, which only works across HDMI-ARC, and not with optical, such as the PLAYBAR uses. 

@PezzaUK
Note: If Simplink is used in conjunction with CEC and the HDMI-ARC port (HDMI-2) then the magic remote will not work with the PlayBar cinnected over optical. You need to use the Optical-out port and search for ‘Sonos’ (case sensitive) in the manufacturers page, within the TV’s device connector setup screen.

I have HDMI CEC enabled as I have a Firestick and PS5 which I’m successfully controlling with the Magic Remote, and I’m not using the ARC HDMI 2 port in case I want to buy a new soundbar in future. I’ve done the Universal Control thing, successfully found Sonos, and it even talks about being successfully enabled, but it then just didn’t actually work for me, volume didn’t change (and indeed connected via optical, I don’t know any other way you’d attach it).

This TV replaced a Sony XE9005 TV, and Logitech Harmony could successfully control that (and Sonos). Sadly despite trying all manner of older LG models it doesn’t seem to work on my G3 (yes it’s connected to the internet).

Anyway currently the end result is totally fine for me, I’m comfy programming HomeAssistant and it was straightforward to enable the TV volume/mute status to be dynamically copied over to the Sonos.