Instructions
Turn off your PlayStation 3 and plug one end of the HDMI cable into your television and the other into the back of the PS3.
Press and hold the PlayStation power button until you hear two beeps, approximately five seconds. Your PS3 should automatically detect the HDMI connection.
Connect both the AV cables and the HDMI cable to manually set the video mode. Select "Settings," then choose "Display Settings."
Select "HDMI" under "Video Output Settings" to change the display mode to HDMI.