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9.2 Troubleshooting
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uorescent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rmly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rmly.
2. Check the video signal source
to see if it is beyond the range
of the display. Please verify its
specicationswiththisdisplay’s
specicationsection.
Displayimagedoesn’tllupthe
full size of the screen
1. The zoom mode is not set
correctly.
2. Scan Mode may be set
incorrectly to underscan.
3. If the image exceeds the screen
size, Scan Mode may need to be
set to Underscan.
Use the Zoom mode or Custom
zoom function in the Screen menu to
ne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 [
] or [ ] button to hear
sound.
3. Switch MUTE off by using the [
]
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.
After-Images can still be seen
on the display after the display
is powered off. (Examples of
still pictures include logos, video
games, computer images, and
images displayed in 4:3 normal
mode)
A still picture is displayed for an over
extended period of time
Do not allow a still image to be
displayed for an extended period of
time as this can cause a permanent
after-image to remain on the display.
CLEANING AND TROUBLESHOOTING
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