Instructions
Turn on your PS3 from the "Power" button on the front of the Blu-Ray player.
Use your controller to scroll through the home screen to the "PlayStation Network" icon.
Press X to select the icona dn then click the "Sign In" button.
Click on the "Account Management" icon.
Click on the "System Activation" icon and then click on the "PS3 System" icon.
Click on the "Game And Video" icons and then click on the "Deactivate System" icon.