PANASONIC MODEL TC29PS78W

Hello primal,

First check your TVs configuration Menu, check for mute and volume controls, make sure these are set to their default setting. Then check to see if any of the other audio outputs are working. If they are then you just may have a loose solder joint at that one audio output I/O port. However if no audio is present on any of the other ports, you may have a defective audio output processor. If the audio processor is defective, it will have to be replaced. I would suggest that you take the TV to a qualified TV repair shop and have them give you an estimate of the cost of repair, and have them do the repair work on the TV. It should not cost much depending on the policy of the shop you take it to.

I hope this helps,
Thank you,
Shuttle83