1. Download HBO GO from the PlayStation Store.

2. Open HBO GO on your PlayStation 3.

3. Select Activate Your Device to get your activation code. Stay on this page until you enter the code on your computer (as per the steps below).

4. On your computer, go to HBO GO activate

5. Choose PlayStation 3 and then choose Continue.

6. Choose your TV provider and then enter the username and password for your TV provider account. If you don't know your username and password, contact your TV provider. If your TV provider isn't listed, then HBO GO isn't offered on the PlayStation 3 by your TV provider.

7. On the Activate a Device screen, enter the activation code from your TV (from step 3), and then choose Activate Device.

8. You should see a "Success" message on both your TV and computer. Sometimes it can take a few minutes for the activation to complete.

More help visit here - HBO go activation | HBO activate