sub Wrote:If its not that, it could be signal issues, and your decoder is only showing you undamaged frames.
With U.S. QAM cable channels, the most likely cause of signal issues is having too many splitters on the line. If at all possible, you should try removing a splitter to see if that solves the problem. My only other suggestion is to check for updated drivers for graphics and tuner. [Edit] Do you see the same problems when you play a recording? If not, the problem might be related to live TV buffer.