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11. Trouble Shooting
Symptom Possible Cause Remedy
No picture is displayed 1. The power cord is disconnected.
2. The main power switch on the back
of the display is not switched on.
3. The selected input has no
connection.
4. The display is in standby mode.
1. Plug in the power cord.
2. Make sure the power switch is
switched on.
3. Connect a signal connection to the
display.
Interference displayed on
the display or audible
noise is heard
Caused by surrounding electrical
appliances or fluorescent lights.
Move the display to another location to
see is the interference is reduced.
Color is abnormal The signal cable is not connected
properly.
Make sure that the signal cable is
attached firmly to the back of the
display.
Picture is distorted with
abnormal patterns
1. The signal cable is not connected
properly.
2. The input signal is beyond the
capabilities of the display.
1. Make sure that the signal cable is
attached firmly.
2. Check the video signal source to see
if it is beyond the range of the display.
Please verify its specifications with
this display’s specification section.
Display image doesn’t fill
up the full size of the
screen
The zoom mode is not correctly set. Use the Zoom mode or Custom zoom
function in the Screen menu to fine tune
display geometry and time frequency
parameter.
Can hear sound, but no
picture
Improperly connected source signal
cable.
Make sure that both video inputs and
sound inputs are correctly connected.
Can see picture but no
sound is heard
1. Improperly connected source signal
cable.
2. Volume is turned all the way down.
3. [MUTE] is turned on.
4. No external speaker connected.
1. Make sure that both video inputs and
sound inputs are correctly
connected.
2. Press [VOL UP] or [VOL DOWN]
button to hear sound.
3. Switch MUTE off by using the
[MUTE] button.
4. Connect external speakers and
adjust the volume to a suitable level.
Some picture elements do
not light up
Some pixels of the display may not turn
on.
This display is manufactured using an
extremely high level of precision
technology: however, sometimes some
pixels of the display may not display.
This is not a malfunction.
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