Instructions
Connect the rectangular side of the S-Video cable into the "AV Multi Out" port on the back of the PS3.
Connect the gray prong into the "S-Video" port on the TV, then connect the white and red prongs into the corresponding "white" and "red" audio ports next to the S-Video port.
Change the TV to its "S-Video" video mode. Some TVs may refer to this as Video or Input. Press the "Power" button on the front of the PS3 to turn it on.