The resolution was the exact same steps. The only difference between this TV and the TV model in the article is, they hid the wifi adapter in the bottom plastic housing of the TV. So you do not immediately see it when you remove the back cover. You have to also remove the screws for the plastic molding at the bottom. This is where the power switch nub and the wireless adapter are stored. Disconnecting the connector from just the wiresless adapter board solved my problem.

Thank you Paul, I saved your article here in 2022 and finally got frustrated enough to go tear apart the TV. Your guidance was super helpful.

Esto solucionó a la perfección un modelo de 60 pulgadas que teníamos jodido hace 2 años.
Creíamos que no habría solución, pero esto lo resolvió de manera sencilla y realmente apreciamos mucho tu esfuerzo.

Sos el mejor, gracias por tu trabajo.

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Resune: IT FU***NG WORKED!!! YHEEEEAAAAAA!!!!

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[ENGLISH TRANSLATION]

This perfectly solved a 60 -inch model that we had screwed 2 years ago.
We believed that there would be no solution, but this solved it in a simple way and we really appreciate your effort.

You are the best, thanks for your work.

In spring 2019 (~21 months ago) I started having the same problem of Unknown Device is Disconnected appearing frequently whenever my LG TV was on. About the same time it started I realized that the TV was no longer connected to wifi, and I was unable to reconfigure WiFi. The WiFi screen actually said “Wi-Fi is turned off. Turn it on to see the list of available networks that you can connect to…”, except there is no setting to turn it on anywhere in the settings. The TV has continued like this for the last 21 months until I received a letter from LG asking me to renew my premium care warranty which I forgot that I bought.

I decided to call for premium care to try out their support. Long story short, it was a horrendous experience that cost me 4 hours on hold including having actually gotten through to someone after an hour on hold that transferred me where I waited about 3 more hours. When I finally got through to someone again it was a like a WWI dog fight where they did every trick to try to shake me off, looking for reasons for why they could just terminate the call, but I did my homework including reading this post first, and I persisted. Finally, after 40 minutes speaking to the rep she agreed to send a technician out. Note, after that ordeal I would strongly advise against LG premium care and just take the DIY route.

2 days later the tech came out, took the back off the TV, and went straight for the WiFi module. I asked if he was replacing the wifi module, and he looked really surprised that I knew what part he was handling. Later he explained that this was a common problem caused by interference as a result of the module ribbon being too close to another ribbon. Without replacing the module he just taped the 2 ribbons apart so they no longer overlapped. Once the back was on again, the Wi-Fi Connection screen showed the list of available network SSIDs and I was able to successfully connect.

No charge from LG, but I tipped him on the way out. I cannot state strongly enough how difficult the LG “Premium Care” was to deal with, but the tech was in an out in 20 minutes.