LG 32LC7D Series Owner's Manual page 83

Press the VOL or VOLUME button.
i Sound muted? Press MUTE button.
i Try another channel. The problem may be with the broadcast.
i Are the audio cables installed properly?
i Adjust Balance in menu option.
i A change in ambient humidity or temperature may result in an unusual noise
when the product is turned on or off and does not indicate a fault with the
product.
i Adjust resolution, horizontal frequency, or vertical frequency.
i Check the input source.
i Work the Auto configure or adjust clock, phase, or H/V position. (Option)
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