Why does my Roland Piano not make any sounds anymore?

Hello!

I have an electric piano of the brand Roland. The piano connects well to the electricity, I can turn it on and its display illuminates. However, the piano seems to have lost its voice. It does not make any sounds anymore. None of the audio exits works (neither the loudspeakers nor the two audio exits for earphones.) Usually, when I turned on the piano on the settings bar (concert hall, organ, etc.) a small red light turned on as well. This light is also gone since the piano has the audio issue. Does anybody know the diagnose for my piano and a potential remedy? Best, C.