You might just switch that Pb cable on both ends with another of the component cables i/e the Pr and see what happens, Make sure to switch both ends of both cables. If it stays the same the cables are good and the TV or Hopper is bad, if it changes the Pb cable is bad.
In a pinch I've used good audio cables to deliver component signals.
Not the greatest but should be good enough for you to see.
In a pinch I've used good audio cables to deliver component signals.
Not the greatest but should be good enough for you to see.