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CHAPTER 8: Troubleshooting
8. Troubleshooting
8.1 Common Problems
This section discusses difficulties that people sometimes have with the ServSwitch
Brand CAT5 KVM Extender for Sun, and suggests possible remedies. If the
recommended actions don’t help, if you don’t see your problem here, or if your
problem keeps recurring, call Black Box Technical Support as directed in
Section 8.3.
8.1.1 K
EYBOARD
The CPU boots correctly with no error messages, but the keyboard does not work at all.
1. Check the keyboard cable and (if necessary) the keyboard portion of the
extension cabling to your CPU or KVM switch; if it’s loose, or if you have the
keyboard and mouse cabling reversed (plugged into each other’s extender-
port connectors), plug the cabling in properly and reset the keyboard as
described in Section 7.2.
2. Check the interconnect cable between the extender’s Local and Remote
Units. Is it intact along its length and securely connected at both ends? And is
it wired correctly? (Compare its wiring with that shown in Appendix A.)
3. Try a different model of keyboard. If the new keyboard works, the original
one might be incompatible (some older autosensing keyboards don’t work
with the extender).
Connecting a keyboard to the Remote Unit has an adverse effect on the remote video.
Try using a newer keyboard. (Some older keyboards require too high a current for
the Remote Unit to properly drive the video signal.)
When I don’t use a keyboard, the extender doesn’t work at all.
See Section 8.1.5.
8.1.2 M
OUSE
There is a mouse cursor on the screen, but the mouse does not work.
1. Reset the mouse as described in Section 7.2.
2. Check the mouse cable and (if necessary) the mouse portion of the extension
cabling to your CPU or KVM switch; if it’s loose, or if you have the keyboard
and mouse cabling reversed (plugged into each other’s extender-port
connectors), plug the cabling in properly and reset the mouse as described in
Section 7.2.
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