No signal issue

Modern TVs are so irritating. They cost a lot of money, have their own OSes, AI processors, eco features, and certifications. And yet my LG G5 can’t turn itself off when there’s no input signal… It knows there’s no signal, it shows it, and it does nothing. Just wasting power. Presumably, to show ads… Which don’t show because I don’t connect mine to the internet. And yes, I checked, there’s no setting to turn off the TV when there’s no signal.

Update.

My TV does turn itself off, but after a long delay. I have not measured it yet, but it could be 10-30 minutes. What I want is this delay to be either zero, or no more than 1 minute.