1. Gather the necessary cables. You will need an AV cable (either composite or component) and an HDMI cable.
2. Connect the AV cable to the PS3. The AV cable has three plugs: yellow, red, and white. The yellow plug goes into the "Video Out" jack, the red plug goes into the "Right Audio Out" jack, and the white plug goes into the "Left Audio Out" jack.
3. Connect the HDMI cable to the PS3.
4. Connect the other end of the AV cable to the TV. The yellow plug goes into the "Video In" jack, the red plug goes into the "Right Audio In" jack, and the white plug goes into the "Left Audio In" jack.
5. Connect the other end of the HDMI cable to the TV.
6. Power on the PS3 and the TV.
7. Select the correct input on the TV. The input will be labeled "AV" or "HDMI".