Gigabyte gt-p6000 tv card --audio but no video

All the channels have sound but no video .
In the "Settings" section VIDEO has all the controls registering "0" but are not adjustable -- What must I do please ?
Thank you
Noel

That has all of the symptoms of being a video codec problem. Ask gigabyte support:

http://ggts.gigabyte.com.tw/tech.asp?ClassID=52&Country=U.S.A.&SourceWeb=B2C