My neighbor and I are having the same problem. Momentary sound drop and then about 1 second of pixilation. I have the 100 and he has the 700. It happens once or twice an hour on all HD including sat feed and off air, recorded and non recorded material. Weather is good. Rewind it and FF it and you can still see the glitch. We watch very little SD so we don't know if the problem also includes SD. If it was just on the sat feed or just off air we wouldn't be concerned.