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User Manual BDL4681XU
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7.2. 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 monitor is not switched on.
3. The selected input has no connection.
4. The monitor is in standby mode in VGA
mode.
1. Plug in the power cord.
2. Make sure the power switch is switched on.
3. Connect a signal connection to the monitor.
Interference displayed on
the monitor or audible
noise is heard
Caused by surrounding electrical
appliances, cars/motorcycles or fluorescent
lights.
Move the monitor 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 monitor.
Picture is distorted with
abnormal patterns
1. The signal cable is not connected
properly.
2. The input signal is beyond the
capabilities of the monitor.
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 monitor. Please
verify its specifications with this monitor’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. Use VOL UP/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 monitor is manufactured using an
extremely high level of precision technology:
however, sometimes some pixels of the
monitor may not display. This is not a
malfunction.
After-Images can still be
seen on the monitor after
the monitor 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
monitor.
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