I'm trying to set up my 13" macbook pro for HD TV viewing, did this successfully for one evening but now I can get video but no sound through the TV. Using the mini-DVI adapter connected to HDMI to TV, and a separate 3.55mm stereo audio plug from the Macbook headphone jack into the audio input on the TV. It's not the cable or the TV receptacle - these work fine when hooked up to my (other) Windows PC. The audio output jack on the macbook is also OK, since I can hear fine using headphones. It's just that with everything hooked up with the 2 cables, and DISPLAY settings set to 'mirror', I get video on the TV but no sound. Anyone have any ideas what is going on? Remember, all the pieces check out OK separately, it's just when hooked up together, the sound is dysfunctional. tks.