Related to this question, but the Raspberry Pi (specifically, Pi 3 Model B) is connected to LG TV through HDMI.
At the same time, the TV is also connected to a cable setup box (some sort of custom Android) through HDMI. In summary, the TV is switched off at night, but still connected to the RPi (shutdown but plugged) and setup box (always on).
Can a shutdown (but still plugged) Raspberry Pi damage the TV? (regardless whether the TV is on/off)
I'm asking this because the TV suddenly refuses to turn on today (the LED indicator is on with red colour, but nothing on the screen). I'm trying to pinpoint the culprit, whether it's the RPi, or the setup box (or both), or other thing (e.g. age).