
1-8
35
Troubleshooting
This section may help you isolate a problem and as a result, eliminate the
need to contact technical support, allowing continued productivity.
No picture
If the Uindicator is not lit
mCheck that the power cord is properly connected.
mCheck that the Uswitch is in the “on” position.
If the “NO INPUT SIGNAL” message appears on the screen, or if the U
indicator is either orange or alternating between green and orange
mTry pressing any key on the computer keyboard.
mCheck that your computer power switch is in the “on” position.
mCheck that the video signal cable is properly connected and all plugs
are firmly seated in their sockets.
mEnsure that no pins are bent or pushed in the HD15 video input
connector.
If the “OUT OF SCAN RANGE” message appears on the screen
mCheck that the video frequency is within that specified for the display.
Horizontal: 30 – 70 kHz
Vertical: 50 – 120 Hz
Refer to your computer’s instruction manual to adjust the video
frequency range.
mIf you are using a video signal cable adapter, check that it is the correct
one.
If no message is displayed and the Uindicator is green or flashing orange
mSee “Self-diagnosis function” (page 38).
No sound from speaker
If the ¤indicator is displayed
mPress the ¤button to cancel muting.
mCheck that the audio plug is properly connected.
mAdjust the volume with .+/– buttons.
mCheck that the headphones are not connected.
mCheck the volume control, muting, sound selector, etc. of the sound
board. (See the computer’s manual.)
Microphone mixing is not possible
mCheck that the MIC plug is properly connected.
mCheck the microphone control, sound selector, etc. of the sound board.
(See the computer’s manual.)
Continued to the next page ➔
Troubleshooting
36
Howling (feedback) is heard
mDecrease the volume with .+/– buttons, or turn down the
microphone input volume of the sound board.
Picture is scrambled
mCheck your computer manual for the proper display setting.
mCheck this manual and confirm that the graphic mode and the
frequency you are trying to operate is supported. Even if the
frequency is within the proper range, some video boards may have a
sync pulse that is too narrow for the display to sync correctly.
Color is not uniform
mDegauss the display (page 27).
If you place equipment which generates a magnetic field, such as a
speaker, near the display, or you change the direction of the display,
color may lose uniformity. The degauss function demagnetizes the
metal frame of the CRT to obtain a neutral field for uniform color
reproduction. If a second degauss cycle is needed, allow a minimum
interval of 20 minutes for the best result.
Screen image is not centered or sized properly
mAdjust the size or centering (pages 22, 23).
mSome video modes do not fill the screen to the edge. This problem
tends to occur with certain video boards.
Edges of the image are curved
mAdjust the geometry (page 24).
Picture is fuzzy
mAdjust the contrast and brightness (page 21). Some brands of video
boards have an excessive video output level which creates a fuzzy
picture at maximum contrast.
mDegauss the display (page 27).
If you place equipment which generates a magnetic field, such as a
speaker, near the display, or you change the direction of the display,
color may lose uniformity. The degauss function demagnetizes the
metal frame of the CRT to obtain a neutral field for uniform color
reproduction. If a second degauss cycle is needed, allow a minimum
interval of 20 minutes for the best result.
mIf moiré is cancelled, the picture may become fuzzy. Decrease the
moiré cancellation effect (page 26).
mIf the GPE mode is set to AUTO, change it to OFF (page 32).
Troubleshooting
37
Picture bounces or has wavy oscillations
mIsolate and eliminate any potential sources of electric or magnetic
fields. Common causes for this symptom are electric fans, fluorescent
lighting, laser printers, etc.
mIf you have another display close to this display, increase the distance
between them to reduce interference.
mTry plugging the display into a different AC outlet, preferably on a
different circuit.
Picture is flickering
mSet the refresh rate on the computer to obtain the best possible picture
by referring to your computer’s manual.
mIf the GPE mode is set to AUTO, change it to OFF (page 32).
Picture appears to be ghosting
mEliminate the use of video extensions and/or video switch boxes if
this symptom occurs. Excessive cable length or weak connections can
produce this symptom.
mIf the GPE mode is set to AUTO, change it to OFF (page 32).
mIf the GPE mode is set to MODE 2, the picture may appear to be
ghosting. Set to another GPE mode (page 32).
Wavy or elliptical (moiré) pattern is visible
mCancel the moiré (page 26).
The moiré may be modified depending on the connected computer.
mDue to the relationship between resolution, display dot pitch and the
pitch of some image patterns, certain screen backgrounds sometimes
show moiré. Change your desktop pattern.
IntelliLight does not work
mCheck that all four corners of the “IntelliLight” window are clearly
displayed and are not covered by another window.
mCheck that the GPE mode is set to AUTO (page 32).
mLeave the display’s power “on” and reboot your computer.
mIntelliLight does not work correctly with an interlaced video mode.
Check the vertical refresh rate in the Properties window of Windows
95/98 and select a non-interlaced mode.
Tiny color bars appear in the corners of the IntelliLight window
mSet the GPE mode to AUTO (page 32).
mCheck that all four corners of the “IntelliLight” window are clearly
displayed and are not covered by another window.
Continued to the next page ➔
Troubleshooting
38
A fine horizontal line (wire) is visible
mThis wire stabilizes the vertically striped Aperture Grille (page 16).
This Aperture Grille allows more light to pass through to the screen
giving the Trinitron CRT more color and brightness.
Hum is heard right after the power is turned on
mWhen the power is turned on, the Auto-degauss cycle is activated.
While the Auto-degauss cycle is activated, a hum may be heard. The
same hum is heard when the display is manually degaussed. This is
not a malfunction.
• If the problem persists, call your authorized Sony dealer from a
location near you, or call Sony Technical Support at 1-888-4SONYPC
(1-888-476-6972).
• Note the model name and the serial number of your display. Also note
the make and name of your computer and video board.
Self-diagnosis function
This display is equipped with a self-diagnosis function. Use this function
if there is a problem with your display or computer.
1. Disconnect the video input cable or turn off the connected computer.
2. Turn the display off and on.
3. Press and hold the >/button for more than 2 seconds.
If all four color bars appear (white, red, green, blue) after a few seconds,
the display is working properly, but there might be a problem with your
computer. Contact your computer’s manufacturer.
If the color bars do not appear, there might be a problem with the
display. Contact your local authorized Sony dealer, or call Sony Technical
Support at 1-888-4SONYPC (1-888-476-6972).
Troubleshooting