ipad keeps flashing 'power off' button
Our ipad, running 8.2, is doing some odd thing where it keeps waking from sleep and shows the 'slide to power off' button. The power button itself only works half the time, but while playing Pandora, for example, the screen will go to sleep for less than 30 seconds, flash the player info, then show the 'slide to power off' button. I've reset all content settings, so do not know what else to do. It seems to always be in this loop when the screen goes to sleep.
Has anyone else experienced this?
iPad, iOS 8.2