Specifications

SERVSWITCH

™

BRAND CAT5 KVM EXTENDER

8. Troubleshooting

8.1 Common Problems

This section discusses difficulties that people sometimes have with the ServSwitch™

Brand CAT5 KVM Extender, 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 PC 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 7.3.1.

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. If your PC is a Pentium

class machine, see the entry for the “My Pentium

class PC...” problem in Section 8.1.3.

4. 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).

When I press keys on my keyboard, the wrong characters appear.

1. Your keyboard might be in the wrong mode. Try resetting it as described in

Section 7.3.1.

2. Power down and reboot the entire system.

The PC always comes up with “Keyboard Error.”

1. If the system appears to work fine after you press [F1] or [ESC], adjust your

BIOS setup so that the PC doesn’t test the keyboard.

2. If your PC is a Pentium class machine, see the entry for the “My Pentium class

PC...” problem in Section 8.1.3.

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.)