Assuming that the battery isn't empty (it can take about 15 minutes of charging before it will respond) have you tried a soft-reset/reboot to see if that gets it to boot up ? Press and hold both the sleep and home buttons for about 10 to 15 seconds, after which the Apple logo will hopefully appear and it will boot up.
Apple Event: May 7th at 7 am PT
iPad not turning on after a factory reset
1 reply
I did a factory reset on my iPad mini. Through iTunes it showed the restore was complete. Now the iPad will not turn on.