|Check that you are watching the HD versions of the cable channels. The SD versions look poor on HD sets since.... the quality is poor which is masked by a low resolution monitor.|
Well, then the explanation provided by the cable guy doesn't make any sense, he said the TV wants 1980p and can't do 1080p all that well Sounds like he doesn't really know what he is talking about...
1080p - Wikipedia I recall my aunt and uncle were proud of their new HD set about 5 yrs ago... I thought it looked like crap compared to my HDTV that had a larger screen and should look worse, not better since fewer pixels per square inch for the same signal. I went through and switched the set from standard to wide screen format and I believe also switched the source from SD to HD and it looked great.
1080p is a set of HDTV high-definition video modes characterized by 1,920 pixels displayed across the screen horizontally and 1,080 pixels down the screen ...
Also, I believe cable companies compress HD channels more than DirecTV which compresses more than Dish which is less than over the air which doesn't compress at all. So, you get better quality by going for less compression.