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Fixya.com
If the mute is ok, you want to check if your have a cable or sat box that the mute on those are ok as well, if so then your looking at a internal issue with the TV that would involve repair.
Try this
1. unplug the tv wait 10-15
seconds then plug it back into the wall outlet.
Also
2. unplug any cable boxes or sat boxes that might be
causing the issue.
If you still are having issues you might want to check it into a local repair shop near you, but take this advice for what its worth you might wind up paying more for the repair then the purchase of a nice flat panel.
Make sure if you do take it into a shop that there registered with the BBB and do not have complaints registered as those shops could end you paying more money.
Thanks for making
Fixya your first choice, We can Fix most things but have solutions for everything.
Regards,
Rulds2008 Btw, I’m available to help over the phone in case u need at
https://www.6ya.com/expert/edwy_1a56970cf1ea4620