17 inch LCD/Keyboard Rack Kit Installation Guide
Trouble
Shooting
Bad
Image
Quality
Image quality problems (blurry characters, distorted images, etc) are usually caused by one of the
following:
The frame buffer is running at the wrong resolution for the LCD monitor:
The monitor optimally runs at a resolution of 1280x1024x60Hz unless the frame buffer cannot
provide this resolution. To display the monitor resolution, press the Menu Button at the top of the
LCD twice. The on-screen display will display the current resolution and frequency. If this is not
what was expected (variances of a fraction of a hertz in the displayed refresh rate are not
significant), it is possible that the frame buffer has been manually configured. To reset the frame
buffer on a system running Solaris 8 or above, use the command “
fbconfig –defaults
” followed by
rebooting the system. With earlier versions of Solaris the reset command is specific to the frame
buffer. Use the appropriate command to the reset your frame buffer (E.g. “
ffbconfig – defaults”
for
the Creator[3D] frame buffer).
Some older frame buffers such as the Creator or Creator3D frame buffer are not capable of
running at 1280x1024x60Hz resolution. In this case the optimal resolution will be
1152x900x66Hz. To check supported frame buffer resolutions on systems running Solaris 8 and
above, use the command “
fbconfig –prconf
” . With earlier versions of Solaris, use the appropriate
command for your particular frame buffer (E.g. “
ffbconfig – prconf”
for the Creator[3D] frame
buffer).
The monitor has not been adjusted for the particular frame buffer driving it:
Perform an "Auto Adjustment" after logging in (ensuring a full screen image is being displayed
prior to running the Auto Adjustment). In some cases it may be necessary to power cycle the
monitor prior to running the Auto Adjust function (e.g. like when the resolution is altered during
the system boot sequence).
Improperly matched timing:
If the Sun system did not read the monitor timing data properly when it was initialized, the timing
may be improperly matched. For the timing data to be read properly, ensure that the LCD monitor
is powered on prior to booting the Sun system.
A KVM (Keyboard Video Mouse) switch is being used in conjunction with the LCD monitor:
In some cases, the KVM may not allow the Sun system to communicate with the LCD monitor at
boot-up. When this occurs the frame buffer may not configure correctly, resulting in a less than
optimal resolution setting in combination with the LCD monitor. If this occurs, it may be necessary
to manually configure your frame buffer to the optimal resolution. The optimal resolution for the
LCD monitor is 1280x1024x60Hz. If your frame buffer will not support 1280x1024x60Hz set the
resolution to 1152x900x66Hz. To find resolutions supported on your frame buffer and you are
running Solaris 8 or above, use the command “
fbconfig –prconf”.
To configure the frame buffer
use the command “
fbconfig –res 1280x1024x60
”. If 1280x1024x60 is not available, use “
fbconfig
–res 1152x900x66
”. If a previous version of Solaris if being used, the commands used will be
dependent on the type of frame buffer. Use the appropriate command for your frame buffer.
NOTE: When the frame buffer is configured manually, the system will initialize using 1152x900
resolution, and only switch to 1280x1024 once CDE starts.
Refresh set rate is too high.
For LCD monitors it is recommended the refresh rate be set to
60 Hz. The monitor is capable of
running at higher refresh rates, but optimally runs at 60Hz. The LCD Monitor uses advanced
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