I’ve got a Samsung UE46ES8000, which I bought back in 2012.
It’s usually fine, works faultlessly.
Suddenly, the wifi stopped working.
If I went to the network settings screen it would constantly fail to pick up ANY wifi networks (not even my neighbours)
I reset my router (just in case) – no avail.
Eventually, I stumbled across some posts online that suggested to do the following:
This worked for me!