Updated to IOS 9.02 but now just a white screen
Update seems to have completed using the File downloaded to my iPad.
the final screen during Update after the black one with the logo and the progress line which had reached the end was another black screen with just the Apple Logo, ...no progress bar at all, followed by a white screen, and then the iPad turns off!
It is still connected to my PC and the sumary page now shows that it is running IOS 9.02, but I can't see anything except the white screen!
WHAT has happened?
Windows Vista