I went through 3 replacements before the camera on the doorbell functioned correctly and did not bleach out.
The Ring doorbell 3 that they sent as replacement for the orognal device I puchased over a year ago, would not operate my indoor existing chimes I have. The oroginal Doorbell 1 did work after Ring downloaded a software change. (and I removed a capacitor in the chime circuit board) I put an oscilliscope on the power lines and pressed the ring 3 button…nothing happened in the advanced mode. (any choice of mechanical, digital 1,2 etc) In the automatic chime detect mode the Ring device created a short distorted signal. (the Ring tried to “short” the wires, but could not do it effectively)
All they had to do is a simple “momentary short” of the 2 wires , lasting about 500 milliseconds (simulating a mechanical push botton)
How difficult is that to do?