I have a SWM-16 setup running (3) HR24-500s and (1) HR34. I have one HR24-500 (2 months old) that will randomly pixelate for no common reason. Sometimes during live TV, sometimes during playback of shows. When it pixelates during live TV I check other receivers on the same channel and its 100% fine on other receivers. Also, this happens on a random channel. Last night 331 was unwatchable, but other channels I tried were 100%. I have reset, unplugged, etc. The receiver is in a rack-mount in the basement with 2" + of room all of the way around it. I find it hard to believe that heat is an issue. Anyone have any ideas? Could it be simply a bad receiver?