Philips Fidelio PS1/12

Dear, I have a the great Philips Fidelio PS1 speakser set, but unfortunately, my main speaker gives no sound anymore. as it is an active speakser set, probably something is wrong in the PCB board. As I tried different resources but all has the same issue. Does someone has same issue and or know possible solution? Has anybody maybe the PCB board layout of this set?