I had to digg deep to find it. You can search for the remote-control codes which grants access to the hidden menu (brand/product related).
One negative thing, when I start the screen I have to exit a message stating how dumb the TV is.
Have fun with your dumb TV :) I love my dumb TV screen, just like any other PC screen.
Update: This way you can go back to smart TV anytime, in case you wanna sell it. No need to flash the firmware.
Unfortunately, I couldn't buy one in my country without having to leave some kidney to pay for it, so, I've just bought a regular one, and guess what, it starts to ask for wifi and to configure it using their proprietary app. Fortunaly there's an option to say no :)
I have a U435CV-UMRD -- the picture quality is very good, but the built-in speakers are suboptimal, so I use it with an external sound bar. I'm not sure about the audio quality of the other models.
A bonus is that there’s no tv in the room taking space.
I’ve been using a projector paired with an appletv for the last 5 years and am happy with it. Limited viewing hours after dark are a plus in my case.
When I powered up it for the first time there was like a 1 second lag between moving the mouse and the cursor moving and I started to scream internally. But I found the "Game mode" and it fixed the lag and killed off all those fancy enhancements features.
HDR works, angles are a bit too narrow for the close sit, though would be fine for 1m+.
I never connected it to the net, the software don't bother me with that at all.
I've even updated the FW on it, the old style - by writing it on the USB thumb-drive and physically sticking it in.