>Tried using another power supply and dock to test - no change
if you tried another power supply (NOT the dock), does the LED light up on the
tip of the cord or not? If yes, did you let it charge for 20 minutes or so
before trying to turn it on? If yes to these questions and you still have this
issue, you probably need an exchange. If you are in the US, you should go to the
closest physical retail Microsoft Store
https://www.microsoft.com/en-us/store/locations/find-a-store - outside the US,
contact support
https://support.microsoft.com/en-us/help/4051701/global-customer-service-phone-numbers.