I have a TH-42PX80U that lost sound yesterday. I have the cable box connected to the TV through a HDMI cable and have the audio outs from the TV going to a home entertainment system. I can hear the sound through the home entertainment system but not through just the TV's speakers. I also have a DVD player hooked up to the TV and there is no sound when playing a DVD through just the TV, so I think it's something in the TV.
Does anyone have an estimate as to know how much a "repair" would cost? I could just continue using the home entertainment system, but it does not have a remote with mute, etc, so using the TV's sound system is more convenient for general TV watching.