Instructions
Turn off the PS3 console if it is currently turned on by holding the power button until the green indicator light blinks and turns to red.
Press and hold the power button for at least five seconds.
Release the button when the PS3 console beeps twice. The PS3 console will start up with factory settings.
Log into your user account, and open the "System Settings" menu on the home screen dashboard.
Select "Video Settings" to display a list of video options. Set your AV output preferences in this option screen.