Instructions
Connect the square side of the PS3 AV cable into the AV Multi Out port on the back of the PS3 to the right of the HDMI port.
Put the red, white and yellow prongs on to other side of the AV cable into the red, white and yellow AV ports on the TV.
Change the TV to the AV video display mode. Depending on the TV, the mode may be referred to as AV, Input or Video. Press the "Power" button on the front of the PS3 to turn it on. You will know the PS3 has been connected properly when the PS3 logo appears on-screen.