Hi inanimate,
Thank you for reaching Microsoft Community. We're sorry to know that your Surface book's volume buttons stopped working.
You may try to boot the device to Windows Recovery Environment (winRE) by only using the power button. To do this, you will repeatedly turn your device off, then on:
- Hold down the power button for 10 seconds to turn off your device.
- Press the power button again to turn on your device.
- On the first sign that Windows has started hold down the power button for 10 seconds to turn off your device.
- Press the power button again to turn on your device.
- When Windows restarts, hold down the power button for 10 seconds to turn off your device.
- Press the power button again to turn on your device.
- Allow your device to restart into Automatic Repair and select Advanced optionsto enter winRE.
If device boot to winRE, you will follow these steps to take you to UEFI screen:
On the Choose an option screen, select Troubleshoot > Advanced options > UEFI Firmware Settings, and then select Restart.
I hope this helps.
Kind regards,
Lavenia