I just upgraded my cable box to the x1 cable box from Comcast/Xfinity. The new box whoever does have the same connectings in the back as the old cable box(Red,blue,green) It only has the red and white audio in and the yellow video components. I'm getting the sound but an error message says that no video or weak video source. When I connect the green component I get a picture but it's black and white. Could someone let me know how to get around this dilemma please ?