Troubleshooting - Sun GDM-17E20 Mode D'emploi

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 u (power) indicator nor the
saving) indicator is lit.
— Check that the power cord is properly
connected.
— Check that the power switch is in the "on"
position.
/ If the (power saving) indicator is lit.
— Check that your computer power switch is
in the "on" position.
— Check that the video cable is properly
connected and all plugs are firmly seated in
their socket.
— Ensure that no pins are bent or pushed in
the 13W3 connector of the cable.
— The monitor will recover when you press
any key on the keyboard.
/ If the u (power) indicator is flashing (green).
— Check that the video frequency range is
within that specified for the monitor.
/ If the u (power) and/or
indicators are flashing (orange).
— Turn the monitor on or off. If the indicator
is off, the monitor is in the normal
condition.
— There is a potential monitor failure.
/ If you do the above procedures and the
monitor does not recover.
— Unplug the video cable (13W3) then press
and hold the >+ button for 2 seconds to
display the color bars. If the color bars
appear, the monitor is in normal condition.
If the color bars do not appear, there is a
potential monitor failure.
Turn the monitor off and on to return to the
normal operation mode.
Color is not uniform
/ Trip the power switch once to activate the
Auto-degauss cycle. This function is to
demagnetize the metal frame of the CRT to
obtain neutral field for uniform color
reproduction. If a second degauss cycle is
needed, allow a minimum interval of 20
minutes for the best result.
White does not look white
/ Adjust color temperature using the option
OSD. (page 8)
Screen image is not centered or sized properly
/ Adjust centering, size or picture rotation using
the OSD. (page 6, 7)
/ Some video modes do not fill the screen to the
edge of the monitor. There is no single answer
to solve the problem. There is a tendency to
have this problem on higher refresh timings.
Edges of the image are curved
You cannot adjust the monitor with the buttons on
the front panel
(power
White lines show red or blue shades at edges
Picture is fuzzy
(power saving)
Picture bounces or has wavy oscillations
Picture appears to be ghosting
Two fine horizontal lines (wires) are visible
Wavy or elliptical (moire) pattern is visible
/ Adjust pincushion using the OSD. (page 7)
/ If the control lock is set to on, set it to off using
the option OSD. (page 9)
You will be able to adjust the monitor.
/ Adjust the convergence using the OSD.
(page 8)
/ Adjust the contrast and brightness using the
OSD (page 6).
/ Trip the power switch once to activate the
Auto-degauss cycle. This function
demagnetizes the metal frame of the CRT to
obtain neutral field for uniform color
reproduction. If a second degauss cycle is
needed, allow a minimum interval of 20
minutes for the best result.
/ If red or blue shades are found at the edge of
images, adjust convergence using the OSD.
(page 8)
/ Isolate and eliminate any potential sources of
electric or magnetic fields. Common causes for
this symptom are electric fans, fluorescent
lighting, laser printers, and so on.
If you have another monitor close to this
/
monitor, increase the distance between them
to reduce the interference.
/ Try plugging the monitor into a different AC
outlet, preferably on a different circuit.
Try the monitor on a completely different
/
computer in a different room.
/ Eliminate the use of video cable extension
cable and/or video switch boxes if this
symptom occurs. Excessive cable length or
weak connection can produce this symptom.
/ These wires stabilize the vertically striped
Aperture Grille. This Aperture Grille allows
more light to pass through to the screen giving
the Trinitron CRT more color and brightness.
/ Cancel the moire using the option OSD.
(page 9) (GDM-20E20 only)
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