IPad locked up due to iCloud Backup

Try setting the iPad in recovery mode:

1. connect the iPad to your computer

2. turn it completely off

3. press the power button (top button) for three (3) seconds

4. without letting go of the power button, press the Home button

5. keep them pressed for ten (10) seconds

6. after the ten seconds, let go of the power button without letting go of the Home button

7. keep pressing the Home button until a message pops in iTunes saying

   iTunes has detected a device in recovery mode, you must restore it before you can use it.

8. restore the iPad

Try doing this a few times if you dont succeed the first time.

You could check the lightning port for dust and try clearing it out (carefully!) with a needle or air compressor. I have had this problem a few times before and fixed it this way.