TCL TVs commonly run the Roku operating system.
With the Roku driver, most of the time, myServer 6 can control the TV on / off.
All Roku hardware (players, TVs) can be Discovered with the driver's Discovery function. You can also manually add it.
For TVs, just change the Device type from "Player" to "TV" so that the myServer out of the box templates / macros can see it as a TV and not as a Player.