Roku Support
posted this on April 03, 2012 15:41
1) Download HBO GO from the Channel Store on your Roku player
2) Launch HBO GO on your device.
3) Click the 'Activate Your Device' button – the next screen should show you your activation code.
4) Navigate to www.hbogo.com/activate
5) Select a Device
6) Select your TV provider.
7) On the Activate a Device screen, enter the code displayed on your television (from step 3), click the 'Activate' button.
8) You should see a 'Success!' message on both your television and your browser.
9) You are ready to start streaming video on HBO GO!