Hello and welcome to JustAnswer.
Lets try resetting your kindle; follow the steps below:
1) Remove your Kindle from the charger if connected.Please remove the usb cable also.
2) Press and hold the Power button on the bottom of the device for about 25 seconds and then release the switch.
3) Please press and hold your kindle for atleast 25 seconds.If you only hold the Power button for only 5 to 10 seconds you'll just turn the unit OFF. So you have to hold the power button for atleast 25 seconds.
Tell me if it makes any difference to your problem.
It verifies the display has gone bad due to the physical shock. The only option left is to replace the display. For that you have to send it to Amazon because amazon directly supports and services the Kindle. You'll need to call them, and obtain an RA# ***** to sending it. In some cases, Amazon will not repair the Kindle and instead will offer a refurbished one at a lesser cost. Here is the link for Kindle Service and Warranty information along with their phone number.http://www.amazon.com/gp/help/customer/display.html/ref=hp_kland_faq_warserv?nodeId=200144510&/lwarrantyYou can also contact kindle support atUnited States: 1-***-***-****Outside the United States: 1-***-***-****