Instructions
Turn on your console.
Scroll over to the "PlayStation Network" icon and select "Sign-In" by pressing "X."
Enter your sign-In ID (e-mail address) and password. It will take several seconds for your console to establish a connection with the PlayStation Network (PSN).
Click on "Account Management."
Scroll down and select the "System Activation." On the next menu, select "PS3 System." A pop-up window will appear with the options "Game" and "Video."
Select what type of content you would like to deactivate with your PS3 account. If you would like to cease your online game usage, select "Game." If you would like to cancel your video-streaming abilities, select "Video."
Click "Deactivate System" to finalize the deactivation of your PS3 account.