Receiver Definition Disappointing And Thin How Can I Fix The Problem Of High-definition Signal Interruption From My HD Cable Box To The Receiver To HDTV?

How can I fix the problem of high-definition signal interruption from my HD cable box to the receiver to HDTV? - receiver definition disappointing and thin

The signal from the cable box to high definition seems to be blurred blocked / distorted or occasionally if a certain type of commercial displays and computer graphics. I checked the component cable and not the problem. TV is a Philips 4 "Plasma TV receiver is a Philips FTR 9965th