1-9
20
Trouble symptoms and remedies
If the problem is caused by the connected computer or other equipment, please refer to the connected equipment’s instruction manual.
Use the self-diagnosis function (page 22) if the following recommendations do not resolve the problem.
Symptom
Check these items
No picture
If the
!
(power) indicator is not lit
• Check that the power cord is properly connected.
• Check that the
!
(power) switch is in the “on” position.
If the NO SIGNAL message appears
on the screen, or if the
!
(power) indicator is orange
• Check that the video signal cable is properly connected and all plugs are firmly seated in
their sockets (page 6).
• Check that the INPUT switch setting is correct (page 9).
• Check that the video input connector’s pins are not bent or pushed in.
x
Problems caused by the connected computer or other equipment
• The computer is in power saving mode. Try pressing any key on the keyboard or moving
the mouse.
• Check that the computer’s power is “on.”
• Check that the graphic board is completely seated in the proper bus slot.
If the OUT OF SCAN RANGE
message appears on the screen
x
Problems caused by the connected computer or other equipment
• Check that the video frequency range is within that specified for the monitor. If you
replaced an old monitor with this monitor, reconnect the old monitor and adjust the
frequency range to the following.
Horizontal: 30 – 130 kHz (CPD-G520), 30 – 110 kHz (CPD-G420)
Vertical: 48 – 170 Hz
If no message is displayed and the
!
(power) indicator is green or
flashing orange
• Use the Self-diagnosis function (page 22).
If using a Macintosh system
• When connecting to a Power Mac G3/G4 that has 3 rows of pins, check that the supplied
exclusive Power Mac G3/G4 adapter and the video signal cable are properly connected
(page 6).
• If you connect to the other version of Macintosh series computer that has 2 rows of pins,
you will need a different adapter (not supplied).
Picture flickers, bounces,
oscillates, or is scrambled
• Isolate and eliminate any potential sources of electric or magnetic fields such as other
monitors, laser printers, fluorescent lighting, televisions, or electric fans.
• Move the monitor away from power lines or place a magnetic shield near the monitor.
• Try plugging the monitor into a different AC outlet, preferably on a different circuit.
• Try turning the monitor 90
°
to the left or right.
x
Problems caused by the connected computer or other equipment
• Check your graphics board manual for the proper monitor setting.
• Confirm that the graphics mode (VESA, Macintosh 21" Color, etc.) and the frequency of
the input signal are supported by this monitor (Appendix). Even if the frequency is within
the proper range, some graphics boards may have a sync pulse that is too narrow for the
monitor to sync correctly.
• Adjust the computer’s refresh rate (vertical frequency) to obtain the best possible picture.
Picture is fuzzy
• Adjust the contrast and brightness (page 12).
• Degauss the monitor* (page 14).
• Adjust the degree of moire cancellation until the moire is minimal, or set CANCEL
MOIRE to OFF (page 14).
21
US
* If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the best result. A humming noise may be heard, but this is not a
malfunction.
Picture is ghosting
• Eliminate the use of video cable extensions and/or video switch boxes.
• Check that all plugs are firmly seated in their sockets.
Picture is not centered or sized
properly
• Set the AUTO (
) function to OK (on) in the SIZE/CENTER menu (page 13).
• Adjust the size or centering (page 12). Note that with some input signals and/or graphics
boards the periphery of the screen is not fully utilized.
Edges of the image are curved
• Adjust the geometry (page 13).
Wavy or elliptical pattern (moire)
is visible
• Adjust the degree of moire cancellation until the moire is minimal (page 14).
x
Problems caused by the connected computer or other equipment
• Change your desktop pattern.
Color is not uniform
• Degauss the monitor* (page 14). If you place equipment that generates a magnetic field,
such as a speaker, near the monitor, or if you change the direction the monitor faces, color
may lose uniformity.
• Adjust the landing (page 14) (CPD-G520 only).
White does not look white
• Adjust the color temperature (page 15).
• Check that the 5 BNC connectors are connected in the correct order (page 6).
Letters and lines show red or blue
shadows at the edges
• Adjust the convergence (page 14).
Monitor buttons do not operate
(
appears on the screen)
• If the control lock is set to ON, set it to OFF (page 17).
IMAGE RESTORATION function
does not operate
• Before using this function, the monitor must be in normal operation mode (green power
indicator on) for at least 30 minutes. For more information on using the IMAGE
RESTORATION function, see page 17.
• Adjust the computer’s power saving settings to keep the monitor in normal operation
mode for more than 30 minutes.
• The monitor may gradually lose its ability to perform this function due to the natural aging
of the picture tube.
USB peripherals do not function
• Check that the appropriate USB connectors are securely connected (page 8).
• Check that the
!
(power) switch is in the “on” position. Then reconnect the USB cable to
the monitor.
x
Problems caused by the connected computer or other equipment
• Check that the power of any self-powered USB compliant peripheral devices is “on.”
• Install the latest version of the device driver on your computer. Contact your device’s
manufacturer for information about the appropriate device driver.
• If your USB compliant keyboard or mouse does not function, connect them directly to
your computer, reboot your computer, and make any necessary adjustments to the USB
settings. Then reconnect the keyboard or mouse to the monitor. If you connect a keyboard
or mouse to the USB connectors and then boot your computer for the first time, the
peripheral devices may not function.
A hum is heard right after the
power is turned on
• This is the sound of the auto-degauss cycle. When the power is turned on, the monitor is
automatically degaussed for a few seconds.
Symptom
Check these items
I MAGE
RESTORAT I ON
AVA
A F T E R
WARM UP
LABLE
I
MENU
E
COLOR
X I T :
