How To Fix iPad2 locked and stuck on iCloud Backup

My iPad 2 is in wifi range and plugged into a power source but it is stuck on iCloud backup popup window and get the error message "This iPad hasn't been backed up in three weeks. Backups happen when this iPad is plugged in, locked, and connected to WiFi" Clicking OK and no way to get rid of the screen. I also can't swipe the slider and power it down because the tablet is locked up and I am unable to access account.

How to fix iPad stuck on iCloud Backup issues
* Reset the iPad to solve the problem.
* Hold down on the home & sleep buttons at the same time for about 10 seconds until the Apple Logo shows up. Then ignore the red slider and the deivece will reboot regularly.
* Tap on Settings > iCloud > Storage & Backup > iCloud Backup, turn it on and tap "Back up Now".