How to reset kindle fire

To buy content and deliver it to your device, you will need to connect to a wireless network and register your Fire tablet to an Amazon account.
If you are setting up a new Fire tablet for the first time, you'll be taken through setup instructions and will have the chance to register your device. Follow the instructions on your screen.
To register your Fire tablet outside of the initial setup screens:

1. From Home, swipe down from the top of the screen and then tap Settings.
2. Tap My Account.
3. Tap Register.
   • If you already have an Amazon account: Enter your Amazon account information, and then tap Continue.
   • If you do not have an Amazon account: Tap Start Here, and then follow the instructions to set up a new account.

Note: If you've forgotten your Amazon account password, you can reset it by requesting that a personalized "password reset" link be sent to your e-mail address. To learn more, go to Reset Your Account Password .
If you need to deregister your device from an Amazon account, follow the steps above, and then tap Deregister. After you deregister your device from an Amazon account, you won't be able to access items stored in the Cloud for that account.
After deregistering, you can register your Fire tablet to another Amazon account. Related Help Topics

• About Wireless Display Methods for Amazon Devices

I do believe that you will need to reset your Kindle?

http://www.lovemyfire.com/kindle-fire-reset-factory-defaults.html

hope this helps?

Go to settings

You may need to go into settings and do factory reset. If you've had your info sent to cloud, it will reload all your info. You may just have to redo a few applications.

Note: Your Kindle Fire lock screen password or PIN is different from your Amazon account password.
Reset Your Kindle Fire Reset your Kindle Fire if you forgot your lock screen PIN or your parental controls password and need to regain access.

If you have any content not saved in your Kindle Library in the Cloud, be sure to transfer that content from your device to your computer via USB.

Important: Resetting your Kindle Fire will remove all content downloaded to it. Any content you purchased from Amazon is saved to your Kindle Library in the Cloud and will remain in the Cloud. You can download that content again if you register your Kindle Fire to your account again.

1. From Home, swipe down from the top of the screen, and then tap More.
2. Tap Device.
3. Tap Reset to Factory Defaults, and then tap Erase Everything.

Your Kindle Fire will restart.

To use your Kindle Fire again, you'll need to connect wirelessly and register your Kindle Fire.

I have sent several links..if still having problems leave a comment or contact.Hope this helps..Richard

Only thing I'd add. If Juseppi's instructions don't work then contact Amazon support.

Sounds like the screen needs to be replaced. The reason you don't see any files is because typically you need to comfirm on the device you want to use it in hard drive or media mode. Either ebay or ifixit.com should have parts. ifixit.com should have a guide for replacing the screen.

You should have called Kindle help desk for that one.

On the home page, tap the gear icon at the top. Tap "More...". Tap "My Account". Tap the "Deregister" icon. After it deregisters it will let you register it again, register it in your name then.