Supposedly, the Spectre 55 inch is 4k and dumb as a rock: https://www.sceptre.com/TV/4K-UHD-TV/U550CV-UMR-55-4K-UHD-TV-product959category1category73.html

Does it bother anyone else to pay for all that "smartness" and then figure out how NOT to use it?

How can consumers fight back against this bullshit?

Got a Sony Bravia OLED and it's set up as a dumb TV, turns on instantly + I never see the Smart TV UI, not even a logo.

What I did was decline everything at setup, hook up to the Internet via Ethernet once to update, unplug Ethernet and set it to turn on to last input.

I researched this recently - here's what I found:

Vizio P65-F1

TCL 65R617

Sony x900e

Hisense H65M7000

Sony KDL-65W855C and Samsung UE65H6400

Sceptre U650CV-U

Sceptre, Supersonic, SunbriteTv, outdoor TV's, and Caixun have non-smart Tv's

https://www.tomsguide.com/how-to/how-to-buy-a-dumb-tv-and-why-youd-want-to

Look into commercial displays.

If it's not been mentioned, you want Commercial Displays, or Large Format Displays. Much more expensive generally for less features, but many are explicitly non-smart.

https://www.cdw.com/content/cdw/en/products/computer-monitors-displays/large-format.html

Almost every TV doesn't have smart functions if you don't connect them to your network.

If you connect your device to a compatible hdmi port and turn on the device first, it should turn on your tv to that input straight away. Boot times should be nearly instant unless you do a full restart of the smart tv.

I hate "smart" TVs too, unfortunately I have one but I just never connected it to the internet. I only use the HDMI input to connect it to my HTPC running Linux and Kodi, it's an awesome setup.

I got a Vizio 4K and refused to give it my wifi access. it boots in maybe 5 seconds and the only issue is the time displayed on screen is way off. otherwise fully functional with no smartness. and it restarts using the same input as when it was last used.

Almost every smart TV I have played with you can set them up to just go to an HDMI input and turn off any "home" menus screens. You also can usually skip any Network setup.

I have played with LG, Vizio, Samsung and Sony TVs all have had options to do this. (But this has been over the last 1-7 years).

Isn't that basically just a monitor?

My Samsung boots fast, goes straight to whatever input I left it on, and doesn’t have smart functions because I don’t have it on the network and never accepted the license for them. I update the software occasionally and then disconnect it again.

It’s older though. I’d try and see if you can play with one somewhere and if they’ll let you reset it to factory.

I have found some. The key is to look for either outdoor televisions or ones designed for commercial use, such as those used for restaurant menus at the counter.

I'm going to assume because you said your shopping for a 4k telly and havent set a set amount that you got the money to afford something decent in that case look at getting a used commercial or large format display I found this for £380 which may interst you or prehaps just buying a smart telly and not connecting it to the Internet

https://www.ebay.co.uk/itm/334520355630?

The latest tvs the boot pretty fast, when you turn them on for the first time just don't agree to the policies and it'll be a dumb tv.

The other option is a computer monitor.

My Sony TV allows for a default input on boot. Wish it allowed a default App on boot...

I need to get non-smart TVs for work and usually end up buying Sceptre TVs. They do everything you're asking, but I don't live with them day-to-day so I'm not sure what they're like in that regard.

I got an LG C3, never plugged in the ethernet cable and changed the song so it starts on that last active input.
I did have to enter my postal code though, which is H0H 0H0.

If there are none, does anybody know a tv that boots fast(less than 30 seconds) and displays an hdmi input by default without the need to choose the input from a menu.

I have a Phillips 4k "smart tv" I keep in "dumb" mode at all times. https://www.usa.philips.com/c-p/65PFL5766_F7/5700-series-4k-ultrahd-led-android-tv-with-google-assistant

Just never ever connect it to the internet, and keep it on HDMI 1.

The TV is even smart enough to detect when there is a live signal on HDMI 1 and it turns itself on automatically. This might be a feature of my stereo having an ARC out HDMI line.

I have all my game consoles, google chromecast, etc etc connected to my stereo, then stereo out connected to the TV's HDMI 1. When I turn anything on it "just works". No menus, no inputs, it just flips on and displays HDMI 1 and keeps its mouth shut lol

Look for a commercial grade television set. For example, on Best Buy, search for 'Television' click the 'Non Smart' option and you will get 38 choices to peruse. BTW, commercial grade is more durable with a longer warranty. Good luck!