This shouldn't be hard. I don't know why it's not working. I'm using a late '08 Unibody MBP 15" and a 52" Sony Bravia LCD TV. I have a Monoprice MiniDisplayPort-to-HDMI cable, and it works great (I'm aware that there's no audio passing through the HDMI, even though technically it should be able to pass it through). Picture looks wonderful. However, the audio will not work. I'm using a 1/8" (headphone) to RCA (left/right) cable, and I cannot get it to work for the life of me. The cable is good. It works for other applications (iPod to soundboard, etc). I plug the MDP-to-HDMI cable into the HDMI 2 port and the computer...bam...works great. Then I plug the RCA-to-1/8" cable into the computer's headphone jack and the appropriate inputs for sound underneath the HDMI 2 port, and nothing. Is there something I'm supposed to do to enable it? All volumes are correct on the computer and the TV. I'm tried other HDMI inputs and respective sound inputs, and still nothing. I've checked the System Preferences for sound, and the "output" is indeed the headphone jack. ANY HELP AT ALL would be appreciated!! Thanks!