follow this steps to fix the problems
Shutting Down
Before physically restarting your Kindle Fire HD, endeavor to shut down the gadget regularly. Press the Power catch on the base of the gadget, and hold it for a few seconds. A message ought to show up on the screen that says, "Would you like to close down your Kindle?" Tap "Shut Down" to shut down the gadget totally. Play Judas on by squeezing the Power catch once more. The gadget ought to restart and take you back to the home screen when it's fueled up effectively. On the off chance that the Kindle Fire HD won't shut down typically, physically restart the gadget to determine the issue.
Restarting
Physically restart the gadget by holding down the Power catch for around 20 seconds; when a clock shows up on the screen, click it to start the commencement. Following 20 seconds, discharge the Power catch, and after that press it again to walk out on. You should see a message that the gadget is beginning up. The home screen shows up once the gadget has effectively restarted.
Investigating
On the off chance that your Kindle Fire HD solidifies or ends up inert all the time, guarantee that the firmware on the Kindle is exceptional, as obsolete firmware could contain bugs. Verify which programming form your gadget ought to have by visiting the Amazon Kindle site. In the event that your gadget solidifies while utilizing a particular application, guarantee you have the most refreshed rendition of that application by visiting the Amazon Appstore and checking for updates. On the off chance that the gadget isn't reacting to contact, clean the screen of any soil or flotsam and jetsam with a marginally moist, build up free material.