I had this problem, so I prised it apart expecting to remove/renew the battery. Inside I discovered the works were retained by 8 tiny steel screws. To keep these safe I decided to store them, on a strong magnet. Starting at the bottom right corner as I brought the magnet to the screw the Kindle immediately stopped malfunctioning. I tested all operations and everyone worked properly and without the sluggishness which had developed over the previous year!! Try this method without prising apart. Start at 4 ( of the clock) and move anti-clockwise. Share the result!!!