This is a known issue. Looks like Google pushed some update that bricked
a bunch of gen1 home mini devices.
https://www.googlenestcommunity.com/t5/Speakers-and-Displays/HOME-mini-UNRESPONSIVE-thread-quot-Google-home-mini-4-dots-stuck-problem/td-p/558...
Couple of my Google home mini gen1 devices suddenly went offline. I
tried to reset using the notch below the power button, as well as the
unplug and wait for 10 seconds then replug x10. Nothing works. This is
the same issue as reported here:
https://...
