When your Smart TV shows a registration or activation code, you need to enter that code on the official activation website shown on the TV screen.
On your phone, tablet, or computer, open a web browser.
Go to the activation web address displayed on your TV screen (such as amazon.com/mytv).
Sign in to your account when prompted.
Enter the registration code exactly as shown on the TV screen and submit it.
Complete Registration
Once the code is accepted, your Smart TV will automatically finish registering and refresh on its own.
Note: Make sure you enter the code before it expires and sign in using the account you want to link with your Smart TV.