Instructions
Turn off the main power switch on the back of the PS3, and disconnect the HDMI cable from the back of your PS3.
Connect the red, white, and yellow composite cords from the PS3 to the corresponding colored composite jacks on your television.
Turn on the main power switch on the back of the PS3. Turn on your television, and select the composite input.
Press and continuously hold down the "Power" button on the front of the PS3. You should hear the first beep to confirm the unit is powering on. Continue to hold the button down for approximately 10 seconds or until you hear a second beep. Release the button once you have heard the second beep. This resets the PS3's video settings to composite. You should now be able to see the video on your television.