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Problem
Lines appear on
the background
screen.
Horizontal noise
appears or the
characters look
blurred.
The screen
displays
abnormally.
An after image
appears when
the display is
turned off.
No sound.
Sound is too
dull.
Sound is too
low.
Screen has
poor color
resolution (16
colors).
Screen color is
unstable or
mono colored.
Black spots
appear on the
screen.
The power is
suddenly turned
off.
Power Button
Lockout
message
appears.
Using Online Technical Support
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ENWW
Possible cause Solution
Screen is out of
Adjust using the procedure described in
adjustment.
Screen is out of
Adjust using the procedure described in
adjustment.
Using an
The proper input signal is not connected to the signal port. Connect the signal cable
incorrect input
that matches with the source input signal.
signal.
Using a fixed
If you used a fixed image for a long time, the pixels might be damaged. Use a screen-
image for too
saver or one of the functions in the ISM Method option of the OSD menu.
long a period of
time.
Audio cable not
Check that the audio cable is properly connected.
connected.
Adjust the volume.
Check the Speaker and Audio Source settings in the OSD.
Equalizer is not
Check the audio settings for Balance, Treble, Bass, and Sound Mode.
balanced.
Sound needs
Adjust the volume.
adjusting.
Color is not set
Set the number of colors to more than 24 bit (true color). Select Control Panel →
correctly.
(Personalization →) Display → Settings → Color quality in the operating system.
Signal cable or
Check the connection status of the signal cable, or reinsert the media player/computer
video card
video card.
connection is
loose.
Black spots are
Refer to
Display quality and pixel policy on page 59
characteristics
of the LCD
panel.
Sleep timer
Check the Schedule submenu of the OSD.
setting is turned
Check the power control settings.
on, or power is
interrupted.
The sleep
Press the MENU and right arrow buttons on the back of the display and hold for 5
button on the
seconds.
back of the
display is
disabled.
Optimizing analog images on page
Optimizing analog images on page
for more details.
Using Online Technical Support
46.
46.
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