Same thing is happening to me. It has been going on the entire 7 months I have had comcast.Iit only happens when I have the audio through my yamaha audio reciever. This problem never occured with AT&T in the same reciever or when I use my PS3 or Blueray. It only happens with my comcast box. The tech that did my install said they dont trouble shoot AV recievers and tried to blame my equip. I have tried everything different HDMI cables, HDMI cable with optical audio cable nothing works. The only way the audio doesnt cut out is if the HDMI goes strait into the TV. I have called and got no help. I dont know what to do excpet switch to someone else. Does anyone have any kind of solution?
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