16:9 widescreen in perma muted

[rog1n]

Hi, I just installed the new widescreen in my E39. Did all the harnessing and it works except it is muted - pressing the knob does not unmute. No sound playing discs, radio and in TV mode shows MUTED at the bottom of screen (See in picture). Also the CODE option was disabled but is now enabled. And it seems to be unable to change language from german to english - there is a option but it wont apply it. Searched around forum but unable to find an answer

[jagerhund]

I installed a TCU in a friend's car and found that the volume was muted. Turned out to be a single wire in the SES jumper plug that was in the wrong location which sent a signal to mute radio sound as if a phone call was coming in...perhaps your issue is similar?