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

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

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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

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.

 

 

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

xProblems 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.

 

 

xProblems caused by the connected computer or other equipment

EN

 

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.

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).

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.

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Sony GDM-F500T9 service manual Trouble symptoms and remedies, Symptom Check these items Picture is ghosting