It seems a bit strange that two systems are faulty!

Have you checked the 'Speaker/Connectivity' setting on your Genos to make sure that it is not set to 'Off'?
Note that here, 'Speaker' refers to whatever is connected to the 'TO SUBWOOFER' socket on the rear of the keyboard (normally GNS-MS01 of course), not the Line or Aux Outs.
To check this press MENU > touch Menu2 > Utility > Speaker/Connectivity
If the 'Speaker' setting is currently showing 'Off', then the GNS-MS01 system will never sound.
If it is set to 'Headphone Switch', then it will only sound when headphones are not connected.
When set to 'On', it will always sound.
Regards
Ian