Kenwood KDC-M9021SE has problem

[Beecky2001]

Hi, I had problems with a my Kenwood KDC-M9021SE mask system. The problem was as usual with these kind of radios was the ribbon cable from t mask to the radio unit. I have replaced this ribbon cable and the mask system works again, but there is still a problem. The mask lights up on the buttons but nothing on the screen. And there is no audio either.
Any tips ?

Thanks


Beecky