LG 15LS1R Series Owner's Manual page 28

Picture OK &
No sound
No output from
one of the
speakers
Unusual sound
from inside the
product
The signal is out
of range.
Vertical bar or
stripe on
background &
Horizontal Noise
& Incorrect
position
Screen color is
unstable or
single color
The audio function does not work.
• 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.
There is a problem in PC mode.
(Only PC mode applied)
• Adjust resolution, horizontal frequency, or vertical frequency..
• Check the input source.
• Work the Auto configure or adjust clock, phase, or H/V position. (option)
• Check the signal cable.
• Reinstall the PC video card.