This should work with Amazon TV, Amazon Fire Stick Generation 1,2, and 3
Steps to Reset Your Amazon Fire TV or Amazon Fire Stick
1. Just in case you’re not at the homepage, Press the “Home” on the remote.
2. On your Fire TV screen Home Page, click Settings
3. Scroll over to the right and click System
4. Scroll down and click Reset to Factory Defaults
5. A dialog will appear that reads “You are about to reset your Fire TV to its original factory
settings. Your sign-in information and personal preferences will be lost”. Click
the Reset button.
6. The system will go through the restore process and this can take approximately 6 to 12
minutes. Be patient and wait for your Amazon Fire TV to reset.
7. Place your new Amazon Account and your all set.