The model number of the TV is: PS 58C6500 TF and I have the earphones plugged into the headphone icon jack. There appears to be no other place other than this one. Thank you Aric. My name is June.
Yes, it is definitely a headphone icon. PC jacks are about 3 or 4 inches below the headphone jack.
I should also mention that we use a sound system but I have tried the earphones both through the sound system and through the TV to no avail.
Most TV viewing is through cable except for SBS and ABC when we view free-to-air. Apparently the cabling in the building does not cater for these channels.
As to the rest of your questions I just don't know if I can answer them. I'm 74 yrs of age and no nothing about this sort of thing.
I've just had a look at the back of the two boxes but, really, I have no idea what to look for.
The sound system is Panasonic SA PT 875.
It appears that all sound is emanating from the Panasonic. I thought when I viewed free-to-air the sound came through the TV speakers but this is not so. I've never taken too much notice of where the speakers for the TV are located but obviously they are built into the set. I can't hear anything coming from the TV.
So in answer to your second question, I am unable to tell if they shut off because I don't know that there is sound in order for it to shut off.
Thank you Aric. What annoys most is the fact that I had a technician (so-called) look at the problem only a few months ago. One would have thought that any competent professional would have picked that up straight away. I appreciate your help. Obviously I need to find someone competent to fix the problem. I appreciate your help Aric.