I have the LaView version, the One Halo -- I haven't been able to get the mechanical chime working unless I disconnected the power kit -- but with the power kit disabled, there was a audible hum from the chime and you could see the plunger vibrating.
I have tried rebooting the doorbell, disconnecting and reconnecting the power kit, reversing the polarity on the back of the doorbell, all with the same results. LaView technical support was not any help but what finally did solve the issue was to just wire the included resistor across the rear terminal on the chime as shown in the attachment. This wiring, with the power kit disabled has the mechanical chime working and no audible hum or vibration. Is there any risk in this configuration?