Troubleshooting - ViewSonic CDP3235 User Manual

6.2.

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
Display image doesn't fill up 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 appliances
or fluorescent lights.
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.
The 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. This display is manufactured using an
A still picture is displayed for an over
extended period of time
25
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 attached
firmly to the back 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.
Use the Zoom mode or Custom zoom
function in the Screen menu to fine tune
display geometry and 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.
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.