LG 42LB1DR Owner's Manual page 146

A P P E N D I X
145
do
o
do
o o
.
p ob
PC
od
.(O
PC
od pp d)
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.
Picture OK & No
sound
Unusual sound from
inside
the
product
No
output
from
one
of the
speakers
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.
The
signal
is
out
of
range
(Invalid format)
Screen color is unstable
or
single
color
Vertical bar
or
stripe
on
background &
Horizontal
Noise &
Incorrect
position
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145