This device must be turned off

Furthermore, the power consumption of the set-top box in standby mode and normal operation is nearly identical, implying that if we do not turn off the switch after watching TV every day, it is equal to leaving it on all the time.

The solution is very simple, you just need to turn off the switch on the TV set-top box, or buy a socket with a switch.
When we do not use household appliances, just turn off the power switch. This way, the power supply to the set-top box can be completely cut off, thereby saving a lot on the electricity bill.