User manual

Appendix
37
Troubleshooting
Overview
Operation problems can be due to a variety of causes. The first step in solving
them is to make sure that all cables are securely attached and seated completely
in their sockets.
In addition, updating the product’s firmware may solve problems that have
been discovered and resolved since the prior version was released. If your
product is not running the latest firmware version, we strongly recommend that
you upgrade. The Firmware Upgrade Utility, page 29, for upgrade details.
Symptom Possible Cause Action
Erratic behavior. Unit not receiving
enough power.
Use a DC 5.3 V power adapter if you
are not already using one. If you are
already using a power adapter, check
that it matches the system
specifications, and that it is plugged in
and functioning properly.
Keyboard and/or
mouse need to be
reset.
Unplug the cable(s) from the console
port(s), then plug it/them back in.
No connection to the
computer.
Check the cable from the switch to the
computer to make sure it is properly
connected.
KVM switch needs to
be reset.
Power off all devices on the
installation; power off the KVM switch;
wait five seconds; then power up.
USB devices not
responding.
USB ports need to be
reset.
Unplug the device’s USB cable from
the USB port on the switch’s rear
panel, then plug it back in.
Use the USB Reset hotkey
combination (see page 23), to reset
the USB ports.
Cannot switch ports
by pressing [Scroll
Lock] twice
Keyboard is
incompatible with
Scroll Lock
invocation.
Switch to the Alternate HSM
invocation keys. See page 21 for
details.
Monitor does not
display after KVM
cable set is hot
plugged.
Some graphics cards
are incompatible with
cable set hot
plugging.
Power off all devices on the
installation; power off the CS1942 /
CS1944; confirm all KVM cables are
properly connected; power on the
CS1942 / CS1944; power on the
computers