GSSL not working, where to start?

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hello good evening everyone, i just finished mounting my gssl 4000 rev7 with that2181c.
sound enters and exits without problems, all the voltage measurement seems correct, but the control panel only works the led, the other controls do not respond, it is as if it were in a continuous bypass.
I have a push button as a bypass, connect as follows.

push button COM pcb hole
pcb ON hole in pusher NC
pcb OFF hole in NO of the button.

I don't have much idea of electronics and I'm stagnating at this point.
thank you
 

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