watching on sony hd tv using verizon hd settopbox and fios,the picture goes dark on the channel i am watching, slight hesitation and sound returns but not the picture. i change channe to get the picture back then it happens again over and over no matter what channel. i use hdmi cable from settopbox to tv. i ran fios diagnostic and i got "DNS :Failed" but not sure that applies to tv service. also i can use sony remote to go to menu etc and get that picture so i am not sure it is a tv set problem.
thoughts on what is happening and the problem/solution?