- Press and hold the power button until the screen turns off (about 10
seconds), then release the power button.
- Press and release the power button to turn your Surface on. You should see
the Microsoft logo.
- Press and hold down the power button until your Surface restarts and you see
the Windows logo screen (this takes about 20 seconds), then release the power
button. If you are still stuck, see if you can get to the UEFI again and see if
there is a disk icon with a line through it.
(Double checking that this is how you are trying to boot to the UEFI:)
- Shut down your Surface (hold the power button for 30 seconds) and
wait 10 seconds.
- Press and hold the volume-up button on your Surface and at the same
time, press and release the power button.
- The Microsoft or Surface logo appears on your screen. Continue to
hold the volume-up button. Release the button once the UEFI screen appears.
If you can't get beyond this, ff 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.
You probably need an exchange.