Are you using the original power supply and adapter that came with your device?
Have you tried putting your device into recovery mode?
For Google Nest Hub (1st gen)
For Google Nest Hub (2nd gen) and Google Nest Hub Max
I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.
We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.