HMD-A200, HMD-A220 (serv.man2) - Sony Audio Service Manual (repair manual). Page 10

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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 16) if the following recommendations do not resolve the problem.

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 
appears on the screen, or if the 

1 

(power) indicator is either orange or 
alternating between green and 
orange

• Check that the video signal cable is properly connected and all plugs are firmly seated in 

their sockets (page 6).

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

x

• 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.

If the OUT OF SCAN RANGE 
message appears on the screen

x

• 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 – 70 kHz
Vertical: 48 – 120 Hz

If no message is displayed and the 

1 

(power) indicator is green or flashing 
orange

• Use the Self-diagnosis function (page 16).

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 
(“HMD-A100” or “HMD-A200”) from among the Sony monitors in the Windows 95/98 
monitor selection screen.

If using a Macintosh system

• Check that the Macintosh adapter (not supplied) 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.

x

• Check your graphics board manual for the proper monitor setting.
• Confirm that the graphics mode (VESA, Macintosh 16" 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 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 10).
• Degauss the monitor* (page 12).
• Decrease the moire cancellation effect (page 12).

• Eliminate the use of video cable extensions and/or video switch boxes.
• Check that all plugs are firmly seated in their sockets.

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* 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.

The main MENU appears on the screen.

The LANGUAGE/INFORMATION menu appears on the 
screen.

m

M

This monitor’s information box appears on the screen.

If the problem persists, call your authorized Sony dealer and give 
the following information.
• Model name: HMD-A100, HMD-A200
• Serial number
• Name and specifications of your computer and graphics board.

• Adjust the size or centering (page 10). Note that some video modes do not fill the screen 

to the edges.

• Adjust the shape of the picture (page 10).

• Cancel the moire (page 12).

x

• Change your desktop pattern.

• Degauss the monitor* (page 12). 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 color temperature (page 11).

• Check that the appropriate USB connectors are securely connected (page 7).
• Check that the 

1 (power) switch is in the “on” position.

x

• 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.

• This is the sound of the auto-degauss cycle. When the power is turned on, the monitor is 

automatically degaussed for 5 seconds.

MODE L : HMD - A 1 0 0

SER I A L : 1 2 3 4 5 6 7 8

MANUF ACTURED : 1 9 9 9 - 5 2

SE L ECT

EX I T

LANGUAGE / I NFORMAT I ON

Example