Thanks for reaching out. We know how challenging it can be not to have a working device when needed. Rest assured that our team is aware of this and is already looking into it. I'd like to gather some details — when did the this start? Are you using the official power adapter that came with the Nest display? Also, have you tried plugging the device to a different power outlet?
Please try these steps below that may help us fix the issue:
Let us know how it goes.