[Sholander]

My first question was about the following matter, maybe someone is so kind to respond to it friendly.

I have just bought a Xiaomi MI Box S and I also have this red light coming out of the Audio opening at the back, when the MI Box S is switched off.
The red light keeps on changing from bright to weak and to off and on again all the time.
What is this MI Box S doing when it is switched off?

Any device that can be turned on via remote control or other remote means, is not fully turned off by such software command; it is only in "Standby" mode waiting for a command to turn it on. In that state various leds/lights can do various things that don't mean anything, except that it's in standby mode.