Maybe it's time people started hacking the TVs and getting custom OSes running on them.
Though I suspect that the processors inside TVs don't have publicly available datasheets, and the actual boards get changed pretty often, so it will be a lot of work for little payoff.
One thing to look at though is to see if your TV has a signage or commercial mode, and switch to using that instead.
I’m just going to use the hdmi ports.