If your Surface Pro/RT fails to start on, you could try using the recovery options to refresh or repair the Windows OS and get it working again.
How to boot Microsoft Surface Pro/RT into RECOVERY mode
* Plugin a USB drive, that has at least 4GB free space, into other Win 8 PC and create a recovery derive.
* Shut down your tablet and connect it with your recovery USB device.
* Press and hold the volume down rocker switch + Power button to boot the Surface into recovery mode. It takes about 5 minutes, so you need to have enough patience to wait. Once it’s completed, select the language and go to access the advanced options from the list.