My old dad has an iPad Air, that he uses every day. It is usually in the charger during the night. A short while ago, he plugged it in as usual, but in the morning it was just dead - completely! Cannot get any response from it, no reaction, no light, nothing. Any ideas on how to wake up a dead iPad? No button combination helps. Charging gives no response. PS! He sits in his chair, reading newspapers or playing solitaire. No rough handeling, and the iPad appears as new (under the cover) - no dents or scratches. I see no reason why it should die.