After returning from a 1 week vacation my iPad has a message box on the screen. iCoud Backup This iPad hasn't been backed up in two weeks. Backups happen when this iPad is plugged in, locked, and connected to Wi-Fi. OK
Nothing happens when I click the "OK" button. The slide to unlock button won't work. If I try to power the iPad off the backup message stays on the screen and the slide to power off won't work.
What do I do???