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7. TROUBLESHOOTING
Before troubleshooting any problem, ensure that all cables are properly connected
and well seated. Check that keyboard and mouse cables are not swapped. Label
and bundle the cables for each computer to avoid confusion when they’re
connected to the KVM switch module.
18
TROUBLESHOOTING
Problem
Nothing works.
VGA monitor
works fine, but
the keyboard and
touchpad don’t
work.
No screen image,
or no OSD menu.
Remedial Actions
Push the assembled drawer and the
KVM module box firmly together, leaving
only 8 mm (5/16”) space in between.
Be sure they’re secured by two screws.
If the CEN36 connector on the KVM
module connects to a KVM drawer, its
local console should not connect to any
keyboard or mouse.
Verify the KVM drawer is bad by
disconnecting it from the KVM module
(the CEN36 connector is not connected).
Connect a keyboard, mouse and
monitor to the “Local” port on the KVM
module and connect another computer
to any of the PC ports, and use the KVM
module as a stand-alone KVM switch.
Turn on a computer and select it by the
front push buttons.
Power up the system via the external
power supply. Select a computer with
a front push button. A red rectangle,
part of the OSD function, should pop
up displaying the port number as the
system is properly powered.
Connect a VGA monitor to the “Local”
port at the rear and check if the VGA
signal presents.
Possible Cause
Bad connection
at the CEN36
connectors.
Another keyboard
or mouse is
connected to the
rear of the KVM
module (marked
“Local”) when
the CEN36
connector is
connected to the
KVM drawer.
The connection
inside the KVM
drawer has come
loose due to
vibration.
A computer is on
but not selected.
The external
power supply is
not connected;
there is no power
to the KVM
switch module.