Troubleshooting - ViewSonic CDP4260-L User Manual

7.2.

Troubleshooting

Symptom
No picture is displayed
Interference displayed on the
display or audible noise is
heard
Color is abnormal
Picture is distorted with
abnormal patterns
the full size of the screen
Can hear sound, but no
picture
Can see picture but no sound
is heard
Some picture elements do not
light up
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)
Possible Cause
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.
Caused by surrounding electrical
The signal cable is not connected
properly.
1. The signal cable is not connected
properly.
2. The input signal is beyond the
capabilities of the display.
Zoom mode is not correctly set.
Improperly connected source signal
cable.
1. Improperly connected source
signal cable.
2. Volume is turned all the way
down.
3. [MUTE] is turned on.
4. No external speaker connected.
Some pixels of the display may not
turn on.
A still picture is displayed for an
over extended period of time
29
Remedy
1. Plug in the power cord.
2. Make sure the power switch is
switched on.
3. Connect a signal connection to
the display.
Move the display to another location
to see is the interference is reduced.
Make sure that the signal cable is
display.
1. Make sure that the signal cable
2. Check the video signal source
to see if it is beyond the range
of the display. Please verify its
Use the Zoom mode or Custom
zoom function in the Screen menu
time frequency parameter.
Make sure that both video inputs
and sound inputs are correctly
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.
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.
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.