I have a strange situation where I need to have a 3.5 mm stereo cable connected between the screen and the Raspberry Pi 3 Model B audio socket in order to have a picture on the screen. If I disconnect the stereo cable in either end the screen immediately becomes black and sleep starts shortly after. I would like to connect the audio connector of the Pi to other speakers, but this is not possible now. Anyone knows the cause of this problem?
The screen is connected to the Pi via an HDMI cable and an HDMI to DVI-D adapter (passive). My screen is not connected to a grounded power jack since I have no such here. Twisting the power cable 180 degrees in the power jack didn't help. The screen is a FUJITSU SIEMENS B17-2 CI:
https://shop.staplesconnect.se/fujitsu- ... c/p1046532