I can't get sound to come out of my TV when hooked up to my computer?

Hi there- I have been trying to watch movies from my computer on my TV (a Samsung), but I'm having problems getting any sound. I am currently running on OS X 10.5.8 on a 2008 Macbook. I originially tried using an HDMI cord and have had no problems getting an image onto my TV, but I wasn't getting any sound and was told the cord was for both audio and visual capabilities. So my next attempt to get sound was to use an RCA to auxillery adapter to my computer, but I'm still not getting any sound. When I go into my sound preferences and see if I can change the output to the TV, my only option availiable is the internal speakers on my computer.
I'm thinking that because I have both the HDMI and aux plugged in, my TV is only trying to read the HDMI cord and not recognizing the RCA input, but I could be completely off. Am I missing something? Thanks in advance for your help!

As far as I know, 2008 Macbooks do not send audio over HDMI. HDMI on these models are Video only.
Also, many TVs do not accept RCA input when there is a HDMI video signal. Some TV's have options to use HDMI and an alternate audio input at the same time. My Philips TV can accept HDMI video and a separate audio in at the same time via a headphone-jack type input. However my TV cannot mix any RCA input with HDMI.
I have sucessfully used my 2006 Macbook on my HDTV using HDMI for video and headphone-jack-input for audio, so it is definitely possible. You just need your TV to play nice.

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I have read your post on how you are not able to get sound from your notebook computer, and I would be happy to assist you in this matter!
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The Product and Model Number of your notebook computer.
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Please re-post with the results of your troubleshooting, as well as the requested information above. I look forward to your reply!
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I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

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Hello again,
oops, I must have missed your last message... sorry for that!
I have to say, that I don t have my digital sound system that long, that I can answer this question for sure. However...
You re right, that it should be possible, although I wasn t able to find a way to do that... yet... Somewhere (don t know if it was this forum or another place) I ve read, that the SPDIF support for Windows Vista isn t that nice at this time... perhaps a new driver will solve this
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I can't get sound to come out of my TV when hooked up to my computer?

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