Things You'll Need
Instructions
Insert the connectors of a HDMI video cable to the HDMI output port on the PlayStation 3 and the other end of the cable to the HDMI input on your TV. Turn the two on.
Press "Menu" on the TV's remote control. Navigate to the "Video" menu (or similarly named menu) and press "Enter" or "OK" button on the remote. Select the "HDMI" input from the list of choices presented. Press "Enter" or "OK" to make the choice active. Press "Menu" to exit the settings.
Navigate in the PS3's menu to the "Settings" icon, using the direction pad on the game controller. Select "Sound Settings" from beneath "Settings," followed by "Audio Output Settings."
Select "Digital Out" from the list of choices on the screen. Press the "X" button on the controller. Press right on the direction pad. Select the "Dolby Digital 5.1" check box on the new screen. Press the "X" button.
Press right on the direction pad until you reach the screen with "Save Settings." Click "Save Settings." Press the "X" button to send audio through the optical output which, not having a cable connected to it, renders the PS3 mute.