Sony, if the display is off but the power indicator is illuminated, the television has switched to “standby mode.” Depending on the manufacturer and model, this mode may facilitate the installation of apps and updates in the background, keep voice recognition functions active, and allow swift powering on of the device to continue viewing. It’s akin to putting your Switch 2 in sleep mode; however, unlike that console, shutting down these smart TVs can be quite a considerable inconvenience.
Various brands frequently obscure a true powered-off state behind a complex array of settings menus, although some, like Amazon Fire TV, simply omit the option — you are left with either “On” or “Standby.” If you cannot locate the setting to turn off your television (or it lacks one altogether), you can always unplug it or connect a smart plug in between the TV and the outlet, allowing you to cut off power through an app. Just ensure that the TV is the sole device linked to the smart plug; running a power strip through the smart plug is not advisable.