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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
No picture
If the 1 (power) indicator is not lit
If the NO INPUT SIGNAL message
appears on the screen, or if the 1
(power) indicator is either orange or
alternating between green and
orange
If the OUT OF SCAN RANGE
message appears on the screen
If no message is displayed and the 1
(power) indicator is green or flashing
orange
If using Windows 95/98
If using a Macintosh system
Picture flickers, bounces,
oscillates, or is scrambled
Picture is fuzzy
16
Check these items
• Check that the power cord is properly connected.
• Check that the 1 (power) switch is in the "on" position.
• Check that the video signal cable is properly connected and all plugs are firmly seated in
their sockets. If you are using the five BNC connectors, connect them in the correct order
(from left to right: Red-Green-Blue-HD-VD) (page 6).
• Check that the input select setting is correct (page 9).
• Check that the HD15 video input connector's pins are not bent or pushed in.
xProblems 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.
xProblems 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 – 107 kHz (GDM-F400), 30 – 121 kHz (GDM-F500)
Vertical: 48 – 160 Hz
• Use the Self-diagnosis function (page 18).
• 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.
• Check that the Macintosh adapter and the video signal cable are properly connected
(page 6).
• Isolate and eliminate any potential sources of electric or magnetic fields such as other
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.
xProblems 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.
• 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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