Hello lathamfrederick,
Thanks for posting here in the Community. Once you've plugged the power cord into the port at the back of your Nest hub, as there’s no manual power button, the device turns on as soon as you switch on the power supply to the Nest Hub. When the Nest Hub boots up, you should see the setup screen on its display that asks you to get the Google Home app on your phone. This screen will have a QR code that will help you during the setup process.
Let me know if that helps.
Best,
Edmond
