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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 18) if the following recommendations do not resolve the problem.
Symptom
Check these items
No picture
If the 1 (power) indicator is not lit
• Check that the power cord is properly connected.
• Check that the 1 (power) switch is in the "on" position.
If the NO INPUT SIGNAL message
• Check that the video signal cable is properly connected and all plugs are firmly seated in
appears on the screen, or if the 1
their sockets. If you are using the five BNC connectors, connect them in the correct order
(power) indicator is either orange or
(from left to right: Red-Green-Blue-HD-VD) (page 6).
alternating between green and
• Check that the input select setting is correct (page 9).
orange
• Check that the HD15 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 computer keyboard.
• Check that the computer's power is "on."
• Check that the graphic board is completely seated in the proper bus slot.
x Problems caused by the connected computer or other equipment
If the OUT OF SCAN RANGE
• Check that the video frequency range is within that specified for the monitor. If you
message appears on the screen
replaced an old monitor with this monitor, reconnect the old monitor and adjust the
frequency range to the following.
Horizontal: 30 – 107 kHz (GDM-F400), 30 – 121 kHz (GDM-F500)
Vertical: 48 – 160 Hz
If no message is displayed and the 1
• Use the Self-diagnosis function (page 18).
(power) indicator is green or flashing
orange
If using Windows 95/98
• If you replaced an old monitor with this monitor, reconnect the old monitor and do the
following. Install the Windows Monitor Information Disk (page 7) and select this monitor
("GDM-F400" or "GDM-F500") from among the Sony monitors in the Windows 95/98
monitor selection screen. If you choose to select "Plug and Play," connect the monitor to
the computer with the HD15 video signal cable. You cannot use the five BNC connectors.
If using a Macintosh system
• Check that the Macintosh adapter and the video signal cable are properly connected
(page 6).
Picture flickers, bounces,
• Isolate and eliminate any potential sources of electric or magnetic fields such as other
oscillates, or is scrambled
monitors, laser printers, electric fans, fluorescent lighting, or televisions.
• 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 (page i). Even if the frequency is within the
proper range, some video 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 brightness and contrast (page 11).
• Degauss the monitor* (page 14).
• If CANCEL MOIRE is ON, the picture may become fuzzy. Decrease the moire
cancellation effect or set CANCEL MOIRE to OFF (page 13).
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Symptom
Check these items
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
• Press the ASC button (page 9).
properly
• Adjust the size (page 11) or centering (page 11). Note that some video modes do not fill
the screen to the edges.
Edges of the image are curved
• Adjust the geometry (page 12).
Wavy or elliptical pattern (moire)
• Cancel the moire (page 13).
is visible
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 13).
White does not look white
• Adjust the color temperature (page 12).
• Check that the five BNC connectors are connected in the correct order (from left to right:
Red-Green-Blue-HD-VD) (page 6).
Letters and lines show red or blue
• Adjust the convergence (page 13).
shadows at the edges
Monitor buttons do not operate
• If the control lock is set to LOCK, set it to UNLOCK (page 14).
USB peripherals do not function
• Check that the appropriate USB connectors are securely connected (page 8).
• Check that the 1 (power) switch is in the "on" position.
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.
• For customers using Windows 95
1. Right-click on My Computer and select Properties.
2. Click on the Device Manager tab. Scroll down and select Universal Serial Bus
Controller.
, If Universal Serial Bus Controller does not appear, you need to load a USB
supplement disk. Contact your computer's manufacturer for more information about
obtaining a USB supplement disk.
3. Select Generic USB Device from the USB controller list and click on Properties.
4. If there is a check in the box next to "Disable in this hardware profile," remove the
check.
5. Click on Refresh.
A hum is heard right after the
• This is the sound of the auto-degauss cycle. When the power is turned on, the monitor is
power is turned on
automatically degaussed for three seconds.
* 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.
Displaying this monitor's name, serial number,
and date of manufacture.
While the monitor is receiving a video signal, press and hold the
joystick for more than three seconds to display this monitor's
information box.
Example
INFORMATION
MODEL : GDM F500
SER NO : 1234567
MANUFACTURED : 1998-52
If the problem persists, call your authorized Sony dealer and give
the following information.
• Model name: GDM-F400, GDM-F500
• Serial number
• Name and specifications of your computer and graphics board.
17
EN
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