Yes, the CN201 supplies the power for the whole LCD. It only has 40V DC, but I’m still careful.
The two black cables are 40V and the white ones are ground.
As I stated before the same happens when I just pull it: the screen turns black and won’t come on again when I put it back in.
The motion sensor seems to be digital but I already tried to replace it without success. The connector C501 in the second picture of my last post is the connection between the control buttons including the motion sensor and the mainboard.
It seems that the first wire labeled as “+3.3V_M” is the power for the motion sensor but I couldn’t get it to work nevertheless. Also, the signal is processed by the main board I guess and as the minimum delay is 5 minutes, this isn’t an option for me anyways.
It seems like I have to live with seeing the OSD sometimes until I decide to swap out the monitor but that won’t happen in the near future.
Anyways, thank you very much for your replies and your time.
If anybody else has an idea or a solution, I’m still happy to try it out.