Please reset the kindle by holding down the on/off switch for 40 seconds (use a watch to time) ignore any messages the kindle may display, then release your finger the kindle should reboot and re-load the operating system, you may have to do this both on and off the charger and upto 4 times before it resets.
Let me know if you need more help
A positive rating is appreciated thank you
Did you see the kindle reboot?it would have flickered and reload the operating system?you did hold the button for full 40 seconds?
You must ignore all messages and keep your finger there for the full 40 did you do that?
Please contact amazon by going to this link <<click
Use the CONTACT button on the left side of the page
Seemingly the software that controls the kindle has gone bad, amazon may replace if its under warranty or offer you another kindle
Note all your books are archived at amazon so do not worry about that
Let me know if I can do anything else here