I recently changed from Dish to Direct tv. I'm pleased with the results. However, recently I've been experiencing a blank screen with sound for 5 or 10 seconds while watching some programming. Last night while watching the Yankees on the YES Network this happened about 4 or 5 times during the game and then no problems afterward. I have a Sony HD tv KDF-E5520 and the HR20 receiver. Would the problem be the receiver or the tv? I've had the tv for a year and eight months. Before I seek help I would like some idea of the source of the problem. I appreciate any advice you could give me.