EN-21
TROUBLESHOOTING
Before sending your LCD monitor for servicing, please check the trouble-
shooting list below to see if you can self-diagnose the problem.
(VGA Mode)
Problems Current Status Remedy
No Picture
LED ON
Using OSD, adjust brightness and
contrast to maximum or reset to
their default settings.
LED OFF
Check the power switch.
Check if AC power cord is properly
connected to the monitor.
LED displays amber color
Check if video signal cable is
properly connected at the back of
monitor.
Check if the power of computer
system is ON.
Abnormal
Picture
Unstable Picture
Check if the specification of graphics
adapter and monitor is in
compliance which may be causing
the input signal frequency
mismatch.
Display is missing, center
shift, or too small or too
large in display size
Using OSD, adjust RESOLUTION,
CLOCK, CLOCK-PHASE, H-POSITION
and V-POSITION with non-standard
signals.
Using OSD, in case of missing full-
screen image, please select other
resolution or other vertical refresh
timing.
Wait for a few seconds after
adjusting the size of the image
before changing or disconnecting
the signal cable or powering OFF the
monitor.
Abnormal
Sound
(Only Audio-
Input model)
(Optional)
No sound, or sound level
is too low
Check the audio cable with the host
PC is connected.
Check if the volume setup of the
host PC is in minimum position and
try to raise the volume level.
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