My particular TV, if it's never been connected to the internet, will not show any ads. It will show a notification that it isn't connected to the internet when you turn it on, but it will work fine otherwise. It'll even switch to the correct video input if you power it on through that port, say through a firetv stick. Otherwise, there's a setting for power on behaviour: 1. go to home screen 2. Go to last used input.