Hello there and welcome to Just Answer. My name is ***** ***** I will be assisting you today. I am an engineer with over 30 years of electrical and electronic training, repair and installation experience. I will try and answer your question accurately and precisely so that we can get you on your way.
Plug the Kindle in so we know it has a good power source.
Your Kindle will either have a button that you push to turn on, or a slide that you 'slide' to turn on.
So press or slide that button in the ON position and hold it there for 45 full seconds.
This will reset the Kindle and hopefully fix your glitch.
Please let me know if it doesn't.