Diagnosis
A solid red light indicates a boot failure or a critical hardware error. The device cannot start its operating system.
How to Fix It
Perform a hard reset. Unplug the Chime Pro from power. Hold down the reset button on the back. While holding the button, plug the power adapter back in. Continue holding the reset button for another 15 seconds. Release. Wait up to 5 minutes for the device to attempt a fresh boot. The light should cycle and then turn off.
If That Didn't Work
The power adapter may be faulty. Try using a different micro-USB cable and a different 5V/1A power adapter. Plug this known-good power combination directly into a wall outlet. The red light failing to change indicates an internal hardware fault.
Heads Up
A persistent solid red light after a hard reset with verified good power typically means the unit needs to be replaced. Contact Ring Support with the device's serial number.