The Nest Community is now Google Home & Nest!
We have moved to a new home. Please visit the Google Home & Nest Community to connect with other users, ask questions, and explore the new space.
my doorbell has exactly same issue as you, suddenly went offline,
couldn't reconnect, can't recharge and can't do factory reset, there is
no yellow light after pressing over 20s. what a bad quality, I only
owned it for a few months.