LG 47LBX Owner's Manual page 83

Press the VOL or VOLUME button.
Sound muted? Press MUTE button.
Try another channel. The problem may be with the broadcast.
Are the audio cables installed properly?
Adjust Balance in menu option.
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.
,_Adjust resolution, horizontal frequency, or vertical frequency.
Check the input source.
m
z
x
Work the Auto configure or adjust clock, phase, or H/V position. (Option)
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