VIEWSONIC VPW450HD - Manual (Page 40)

38 ViewSonic VPW450HD
TROUBLE SHOOTING
Troubleshoot Common Conditions
The following list represents possible anomalies that you may encounter and methods for remedy. Please
refer to this checklist prior to contacting a service representative.
Symptom Possible Cause Remedy
No picture is displayed 1. The power cord is disconnected.
2. The main power switch on the back of the dis-
play is not switched on.
3. The selected input has no connection.
4. The display is in standby mode in RGB mode.
1. Plug in the power cord.
2. Make sure the power switch is switched
on.
3. Connect a signal connection to the dis-
play.
4. Press any key on your keyboard.
Interference displayed on the
display or audible noise is heard
1. Caused by surrounding electrical appliances,
cars/motorcycles or fluorescent lights.
1. Move the display to another location to
see if the interference is reduced.
Color is abnormal 1. The signal cable is not connected properly. 1. 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 does not fill up
the full size of the screen
1. If under RGB mode, the H-Size and V-Size is
incorrectly set.
2. If under TV, AV1, AV2, or Component with
480i input, the 4:3 WIDE mode is switched on.
1. Use H-Size and V-Size to adjust the size
of the video.
2. Use the WIDE key to scroll through vari-
ous full screen modes.
Can hear sound, but no picture 1. Improperly connected source signal cable. 1. 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.
1. Make sure that both video inputs and
sound inputs are correctly connected.
2. Use VOLUME +/- to hear sound.
3. Switch MUTE off by using the MUTE
button.
Some picture elements do not
light up
1. Some pixels of the plasma display may not turn
on.
1. This display is manufactured using an
extremely high level of precision technol-
ogy; however, sometimes some pixels of
the display may not display. This is not a
malfuction. Please see the enclosed war-
ranty card for more information.
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)
1. A still picture is displayed for an over extended
period of time.
1. Do not allow a still image to be displayed
for an extended period of time as this can
cause a burn in.