SilverCrest KH2311 micro system Hi-Fi : no sound output.

I found a SilverCrest KH2311 micro system Hi-Fi, the issue is that there is no sound output from the two speakers, nor from a Headphone plugged into the mini jack connector. The device does switch on, the screen is fine. I try to listed the FM radio.

Note : When plugging the headphone in, I hear a “click” sound in the headphone speakers, so it seems it is powered, but that the issue is from some electronic part.

Note 2 : SilverCrest is a brand for electronics goods sold by the European markets brand Lild. The real manufacturer is certainly some chinese company, but i could not find a clone model.