That sounds like your Pr plug has become disconnected on your COMPONENT connection....
Take a Close Look at that plug, sometimes they look connected when they are not.
I usually find it disconnected on the box, and the TV connection is still connected, but check both ends, and reseat them no matter what....
You'll get your reds and greens back. While you are back behind the box, reseat ALL of them, because the others have been slowly pulling out over time too.
If your cables haven't been separated by 8 to 10 inches, keep in mind that a lot of the Component cables were designed to be separated on the ends by the manufacturer. I usually see that most of my customers just plug them in and don't separate the ends of the cable for more flexibility. That's what causes them to slowly pull out of the plugs.
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Tips are greatly appreciated !