For all the HD free preview channels like H2HD, Lifetime HD, and Slice HD, I get the audio but I do not get any picture. Why?
Your equipment is not Mpeg4 capable.
The new channels are MPEG4 stations, if your terminal doesn't understand MPEG4, you will get audio but no video, there is further reading here about it here Guide to MPEG4 Channels and Digital Cable Boxes
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