BDL4988XL
35
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
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
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 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
[ ]
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.
