Originally Posted by Oldfart

My father's i-Pad froze and wouldn't thaw. He took it to the local Apple store. The person he spoke to there went above and beyond. As Dad put it, "press the home button with the on/off button at the same time for 18 seconds. This apparently rejigs the chip. He confided ‘it’s a secret’ and certainly not included in trouble-shooting."

I'm not an Apple user, but this may be of interest to those who are.