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CHAPTER 8: Troubleshooting
4. Check the video-extension cabling, patch-panel video connections, and other
video connections in the system. Make sure everything is properly and
securely attached.
5. Are you using an LCD panel? You might need to reduce the refresh rate of
your graphics card’s output.
Each character has separated into overlapping sets of red, green, and blue pixels; the effect is
like trying to watch a 3-D movie without 3-D glasses.
1. Check the interconnect cable between the extender’s Local and Remote
Units. Is it solid-core CAT5 cable? (Do not use stranded cable or cables rated
“Level 6” or higher. We don’t recommend using CAT5e cable for runs longer
than 400 ft. [121.9 m].) Is the cable intact along its length and securely
connected
at both ends? And is it wired correctly? (Compare the cable’s specs
with those listed in Section 4.2.4 and its wiring with that shown in Appendix
A.)
2. Check the video-extension cabling, patch-panel video connections, and other
video connections in the system. Make sure everything is properly and
securely attached.
3. The video compensation might not be set correctly. See Section 6.4.
4. Check the settings of the Remote Unit’s distance jumpers; you might need to
try a higher setting. See Section 5.1.
The monitor sometimes loses sync, causing it to go blank for a second or two.
This could happen if your electrical power system is very noisy (particularly on the
ground lead). Also, don’t route your interconnect cable anywhere near power lines
or other powerful sources of interference such as generators, motors, or
fluorescent lights. If this is a persistent problem, please discuss it with Black Box
Technical Support.
I only need video—not keyboard/mouse control—but I can’t get a picture.
Even if you are only using the extender for video extension (to drive video to a
remote monitor), the extender’s Local Unit must still be attached to the keyboard
port of a Sun CPU or KVM switch, because that’s where it gets its power. If your
application makes it impossible to connect the extender to a keyboard port, call
Black Box Technical Support about getting an alternative power supply for the
Local Unit.
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