title_body: Kindle Reader no longer syncing correctly
upvoted_answer: Hold the power button or slider for about 20–30 seconds. Release it then hold it for about 5 seconds or until you see something happen on screen. That does a power on reset. Obviously you’ll have to make sure it’s charged.
  Alternatively you can start it as normal then:
  
  From the Kindle Home screen, press Menu.
  Select Settings.
  Press Menu.
  Select Reset to Factory Defaults.