Is my rings broken?

Hi People,
i was going to use my Rings today, i have to say it was months that i didn’t use it,
it seems it works, i send gate and cv and i can see the led following the gate.
but no sound at output, even if i send just an audio input.
is there a way to fix it out by myself? like factory reset or something

thanks for helping me

Are you sure your module receives -12V?

hey Thanks for helping,
i was going to write right now,
i unmounted my modules on both rows and i have seen the -12 V cable of the Rings Row not connected.
thanks a lot