AVS Special Member
Join Date: Sep 2006
Location: Long Island and Upstate NY
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DVI only carries video, not audio. This is normal.
To get audio, connect standard audio cables (red+white) from the audio out of the cable box to the DVI audio input on the back of your tv. Looking at the specs you provided, these will be the jacks on the lower right if you are facing the back of your TV that is paired along the DVI input that says "HD input, AV5".