what I meant is that if you leave the tv on a different input than the one that has the built-in media player, does the tv can still show you ads and track you ?
Is it impossible now to completely avoid the built-in OS ?
If you plug the Smart TV to the Internet, the TV will dastardly display ads, sometimes over HDMI, sometimes over composite video, and mostly through the TV apps.
Keeping the Internet away from the TV and you should be entirely just fine and ad-free.
You're saying that some TVs will display ads when, for example, I'm using my Switch connected to an HDMI port? What kind of dystopia is this? Do you have an example of this happening?