LG 37LP1D Owner's Manual page 71

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 back-
ground &
Horizontal Noise &
Incorrect position
Screen colour is
unstable or single
colour
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 it whether the signal cable is connected or loose.
• 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.
Reference
71