hi, I saw your problem and had the same...never have resolved it completely...but i did find a work around using the mini sound jack into the back of the Tv. I reset the TV sound to be analog and it works just fine. The HD video is much better than with the vga connector and i can use more of the TV's controls for the picture. It's not the solution I want but it does work.
Hope this doesnt come too late for you.