I would like to know if there is such a device or function that can switch your TV off independently, without anyone being able to switch it on again, until a time you want it on again.
I would like my TV to switch off at 11.30pm automatically and not come on again OR BE ABLE TO BE SWITCHED ON AGAIN UNTIL 7AM.
I don't see how there can be such a device save that it was part of the TV design. Anyone can plug a TV in elsewhere.
What may be possible, and I've not checked, is some kind of locking device over a mains socket ? Which would allow you to turn it off then lock it so the switch can't be pressed or the plug removed ?
Even then someone could cut the plug off, add another, and plug it in elsewhere.
There may be a function on your tv which allows you to set a pass code so that it can be switched on but no prog's can be watched until the code is entered.