iOS 9.2 May Fix Your Unresponsive iPad Pro Black Screen: Apple
Last month, users dealing with an unresponsive black screen issue on their new iPad Pros were told by Apple a fix was coming. The company’s support document on the issue has been updated to note iOS 9.2 may fix the issue from happening (via MacRumors):
Updating your iPad Pro to iOS 9.2 or later might prevent this issue from occurring in the future.
If updating to iOS 9.2 doesn’t work, you can try some of these possible fixes and see if they work or not.