Fix Sonos Audio System Not Playing Through Speakers

Is anyone familiar with Kenneth Band office? I'm having an issue with the audio system there. They have this setup. Sonos controller is accessible, I can ping it, and play music at sonos app, but music is not playing anyways. Onkyo amplifier is on, and is at CD source, we tried with other sources too, and the MONSTER CABLE device is connected.

seems like input device is not correctly configured, have you checked it?

Is at CD, we tried all the inputs. It's showing as off there at the picture, but it's on

That speakers A | B on left side, is it pushed in? If nothing was changed, reboot of wi-fi/ amp and music server is recommended

Yep, A * B are already pushed in

We rebooted the amp, sonos device, everything already

Are they using a volume knob switch at the front desk area?

I dont think so, I think that they use sonos app for that

either amp or speaker select fried

ask them to change input on radio am

see if anything comes out from speakers

No music if they use radio input

Sonos should be fine, should be the amp or speaker selector