You want your favorite streaming service on there? Get an older (used office) PC, load it up with (your prefered flavor of) Linux, get a bluetooth keyboard mouse combo, hook it up to your HDMI port, and go ham.
Some TVs even let you turn them on directly to a specific HDMI port for a bonus fun time of never having to see the TVs menu.
Never connect them to the internet
You want your favorite streaming service on there? Get an older (used office) PC, load it up with (your prefered flavor of) Linux, get a bluetooth keyboard mouse combo, hook it up to your HDMI port, and go ham.
Some TVs even let you turn them on directly to a specific HDMI port for a bonus fun time of never having to see the TVs menu.