Hi SJCSwallow,
Thanks for reaching out to Microsoft Community and posting your inquiry. We appreciate the effort in performing initial troubleshooting steps.
We also recommend waking the device using hot keys. Press the Windows logo key + Ctrl + Shift + B. This restarts the graphics display driver. If the device was stuck on a black screen, this may resolve the issue.
If the issue would still persists, please reach out to the Microsoft Surface Supportteam to check your exchange options. If you're located outside the United States, the Global Support is also available to assist.
Kind regards,
John Neil_J