My iPad is not turning on though charged for one hour and hard reboot
If you followed those instructions for resetting, restoring or recharging the battery in your iPad then you are left with the last line.


  Eventually, you'll need to have the iPad serviced if it cannot wake from sleep due to a very low battery charge condition even when plugged into power.


We have a number of independent phone/tablet repair shops nearby. You may as well. Ask around for a reputable one and have them look at it. Yes you could take it to an Apple store, but if the independent store is good at their job it will likely be faster and cheaper there. But totally your call.