On my TCL TV, it's impossible to disconnect the wifi after you connect it. The button just doesn't exist. I had to make a new network, connect to that, and shut down the new network.
I do not understand the downvotes. I mentioned desolder in case some TVs have wiring that cannot be detached easily. People seem to have taken me to be a paranoid agent of sorts (my working assumption) just because of one word. Is this really the privacy community, or a place to discourage people from taking privacy into their own by (sometimes) doing the slightly difficult-to-do work?