Have you <span id="INSERTION_MARKER">tried another audio input device like a DVD? I'm guessing when you say internal speakers you mean headphones?
Suddenly the audio stopped working on for both the internal and external speakers on our 32" LG HD LED TV. Have checked all of the audio settings and cables but nothing was touched before this happened. The TV is about 3 years old. Is the audio circuit gone? Can it be fixed?