What if your kindle won't start:

      I had this problem and a quick search on Google led me to the link where it was suggested you hold on the power key for 50 sec. I did the same and nothing happened until I press the page turn key for another 5 sec. So I am not sure which did the trick. Holding it for 50 second or pressing the page turn key. Anyway I am glad that I looked over the internet and get back my Kindle working again.