Depends on the TV, unfortunately. The Samsung(?) TV we had used to have ads pop-up on boot. It would show a black screen for the duration of the ads if you disconnected it from the internet, so you were stuck waiting.
My current LG TV has its stupid ad-filled menu pop-up whenever I turn it on and it takes a while to disappear too, regardless of if it’s connected to the internet or not.
Depends on the TV, unfortunately. The Samsung(?) TV we had used to have ads pop-up on boot. It would show a black screen for the duration of the ads if you disconnected it from the internet, so you were stuck waiting.
My current LG TV has its stupid ad-filled menu pop-up whenever I turn it on and it takes a while to disappear too, regardless of if it’s connected to the internet or not.