No sound on on only one channel

press it hard and try to vibrate the button sometimes it makes bad contact or random connection. Also try different remote or ask you cable provide for replacement.

It seems that the "Lang" button on the remote may be pressed by mistake. Try setting the language to English and see if all the channels now broadcast sound.

I think you need to look at the sound settings. In particular the type of sound. HD channels often carry AAC sound, suitable for Dolby 5.1 and Standard Channels don't. So the sound system will switch modes when you change channels. However the receiver is not switching back to picking up PCM signals, the type used on SD channels.

You would need to ask the broadcaster of the stations that question.

The SAP feature has been turned on. Look for a button that says SAP or go thru the audio menu and turn it off.

To get back sound channels ect just select the channel in question press menu, 
select installation, select manual scan, click ok on down frequency. 
It'll now scan for channels when its finished exit back to normal 
tv viewing screen go to the end of your channel listing and the desired channel will be there with sound. 
This can be done on any channel with no sound by just selecting that channel following the instructions above. 
Hope this helps 

Most of HD channel broadcast in 5.1 channel sound. Regular channel broadcast in 2.0 channel sound. You TV only have 2 speakers so you will expect the sound will be low compare with the regular channel.

Hope this will help!

Be sure the sound source has a center channel output ie. not a 2 channel source only, try the test tone setup for 5 or 6 channel balance, if no sound from the center channel still then it is looking like maybe the center channel is blown.

all of the channel are resonding to the test. but you cant notice it bec 5.1 speakers, each channel are designed to respond to a certain frequecies.  the L/R channel your talking about have the mid-range frequecies so it responds clearly compared to other channels...

 

hope that helps...

It worked fine yesterday. Sound on all channels. Sometimes the picture goes black on channel 6. We can get it back by going up one channel, then back to 6. it is due to cable signal ie weak. now there is no sound this is due to sound section 1 loose connect in sound section 2 speaker 3 problem in sound section some part must have failed.