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007-4209-003
5: Troubleshooting and Technical Specifications
If the above line does not appear, the troubleshooting tips in Table 5-1 may help you
to isolate a problem.
If Both Monitors are Blank
If neither of your monitors has an image, follow the steps in the apropriate section below.
Table 5-1
DCD Troubleshooting Tips
Symptom
Possible Cause
Dual Channel Display does not appear in
hinv
.
Either the board is installed incorrectly, or it is
defective. If the board is installed in an Octane2,
repeat the installation steps again, and make sure
you insert the board correctly. If reseating the board
does not solve the problem, the board may be
defective. If these steps do not help, or if the board is
installed in a Silicon Graphics Fuel workstation, call
your SGI service representative.
Same image appears on both monitors.
Timing mode is set to single channel. See Chapter 3.
Monitors are blank.
Connect a monitor to the original monitor port and
run
hinv
, as described in “If Both Monitors are
In single channel modes, one monitor
displays the image correctly, but the other
monitor’s image is bad.
The board is probably defective. Contact your SGI
service representative.
The images on both monitors alternate
between the correct image and noise, a
constant color, or a badly flickering image.
The board is probably defective. Contact your SGI
service representative.
In dual channel mode, two superimposed
flickering images appear on a monitor
connected to the original graphics board
monitor port.
Currently, the original graphics board monitor port
is not disabled when the board is running in dual
channel mode. If you connect a monitor to the
original graphics board monitor port in dual
channel mode, the monitor displays alternating
images from the left and right channels.
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