Please let me know any idea this problems
Try a resset. Press and hold the Home and On/Off buttons simultaneously until the Apple logo appears then release. May take 10 to 15 seconds. Equivalent of a re-boot, you will not lose any data.
It does not reboot after Apple logo appears.
if its stuck in a boot loop of just the apple logo you might need to restore your iPad via iTunes with it in recovery mode. Here are the instructions to restore your iPad in recovery mode.
Retrieving data ...