Press and hold the settings button for at least 2 seconds. The screen will refresh and reconnect to your home Wi-Fi.
Check the connection status in the top left corner of the app homepage. It may take up to a minute to reconnect.
Full board reset
Use a flathead screwdriver to remove the hardware plate and expose the terminal connections and reset button. Press the small button with the sharp end of the screwdriver to reset power to the board.
If the display doesn't come back on, check your GFCI outlet and breaker to make sure power wasn't tripped.