Sony GDM-F420: Troubleshooting

x Letters and lines show red or blue shadows at the

edges

Troubleshooting

• Adjust the convergence.

x No picture

x USB peripherals do not function

If the ! (power) indicator is not lit

• Check that the appropriate USB connectors are securely connected.

• Check that the power cord is properly connected.

• Turn the monitor OFF and then ON again, then reconnect USB cable.

• Check that the ! (power) switch is in the “on” position.

• 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

The ! (power) indicator is orange

function. First connect the keyboard and mouse directly to the

• Check that the video signal cable is properly connected and all plugs

computer and set up the USB compliant devices. Then connect them

are firmly seated in their sockets.

to this monitor.

• Check that the INPUT switch setting is correct.

• Install the latest version of the device driver on your computer.

• Check that the HD15 video input connector’s pins are not bent or

Contact your device’s manufacturer for information about the

pushed in.

appropriate device driver.

• Check that the computer’s power is “on”.

• The computer is in power saving mode. Try pressing any key on the

x A hum is heard right after the power is turned on

computer keyboard or moving the mouse.

• This is the sound of the auto-degauss cycle. When the power is

• Check that the graphic board is completely seated in the proper bus

turned on, the monitor is automatically degaussed for a few seconds.

slot.

* If a second degauss cycle is needed, allow a minimum interval of

If the ! (power) indicator is green or flashing orange

20 minutes for the best result. A humming noise may be heard, but this is

not a malfunction.

• Use the Self-diagnosis function.

x Picture flickers, bounces, oscillates, or is scrambled

• Isolate and eliminate any potential sources of electric or magnetic

On-screen messages

fields such as other monitors, laser printers, electric fans, fluorescent

lighting, or televisions.

IIONNFORMAT

• Move the monitor away from power lines or place a magnetic shield

MON I I I NGS WORKTOR

near the monitor.

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ACT

IVATE

BY

COMPUTER

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• Try plugging the monitor into a different AC outlet, preferably on a

CHECK

S GNAL CABLEI

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CHECK

I NPUT SELECTOR

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different circuit.

B

• Try turning the monitor 90° to the left or right.

• Check your graphics board manual for the proper monitor setting.

• Confirm that the graphics mode and the frequency of the input signal

1 If “NO SIGNAL” appears:

are supported by this monitor (see “Preset mode timing table” on

This indicates that no signal is input from the selected connector.

page i). Even if the frequency is within the proper range, some

graphics board may have a sync pulse that is too narrow for the

2 Shows the currently selected connector.

monitor to sync correctly.

3 Shows the remedies.

• Adjust the computer’s refresh rate (vertical frequency) to obtain the

• If ACTIVATE BY COMPUTER appears on the screen, try

best possible picture.

pressing any key on the computer or moving the mouse, and

x Picture is fuzzy

confirm that your computer’s graphic board is completely seated

• Adjust the contrast, brightness, and PICTURE EFFECT.

in the correct bus slot.

• Degauss the monitor.*

• If CHECK SIGNAL CABLE appears on the screen, check that

• Adjust the degree of moire cancellation until the moire is minimal,

the monitor is correctly connected to the computer.

or set CANCEL MOIRE to OFF.

• If CHECK INPUT SELECTOR appears on the screen, try

x Picture is ghosting

changing the input signal.

• Eliminate the use of video cable extensions and/or video switch

boxes.

IIONNFORMAT

• Check that all plugs are firmly seated in their sockets.

MON I I I NGS WORKTOR

I1:.200 0 /kHz 85Hz

NPUT

x Picture is not centered or sized properly

OUT OF SCAN

RANGE

W

R

• Perform the Auto Size Center function.

CHANGE

S GNAL TIIINGM

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• Adjust the size or centering. Note that with some input signals and/

B

or graphics board the periphery of the screen is not fully utilized.

• Just after turning on the power switch, the size/center may take a

1 If “OUT OF SCAN RANGE” appears:

while to adjust properly.

This indicates that the input signal is not supported by the monitor’s

x Edges of the image are curved

specifications.

• Adjust the geometry.

2 Shows the input signal frequency.

x Wavy or elliptical pattern (moire) is visible

3 Shows the remedies.

• Adjust the degree of moire cancellation until the moire is minimal.

• Change your desktop pattern.

CHANGE SIGNAL TIMING appears on the screen. If you are

replacing an old monitor with this monitor, reconnect the old

x Color is not uniform

monitor. Then adjust the computer’s graphic board so that the

• Degauss the monitor.* If you place equipment that generates a

magnetic field, such as a speaker, near the monitor, or if you change

horizontal frequency is between 30 – 137 kHz (GDM-F520),

the direction the monitor faces, color may lose uniformity.

30 – 115 kHz (GDM-F420), and the vertical frequency is between

• Adjust the landing.

48 – 170 Hz.

x White does not look white

• Adjust the color temperature.

• Check that the 5 BNC connectors are connected in the correct order.

x Monitor buttons do not operate ( appears on the

screen)

• If the control lock is set to ON, set it to OFF.

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