For the past few months have been having problems with intermittently complete loss of sound. Last night (Sunday) started a PVR recorded program only to have no sound. From past experience I have to go to SETTINGS>AUDIO OUTPUT> then select STEREO and then BACK TO DOLBY DIGITIAL. That gets the sound back again. It also happens when switching from one HD channel to another. As I said it is very intermittent and can go for days then all of a sudden the problem starts. A lot of times the sound is delayed when switching to a new channel. Yes, the other portal does it occassionly as well.
1/ any ideas as to what is causing the problem?
2/ is there a fix?