title_body: How can I fix this kindle?
upvoted_answer: To be honest there are high probabilities that your screen died when you dropped the keyboard on the kindle's screen.
  My suggestion if you wanna keep it would be to remplace the entire screen by buying a brand new and following a tutorial like this one. 
  
  Otherwise taking into account that the release date of the kindle DX was on July 1, 2010. You may consider buying a newer model from Amazon Kindle or Rakuten Kobo.