User guide

Troubleshooting
Appendix D
55
Problem Solution
No power
 Check the power cord.
itch is turned ON.
ter to MCCAT.
 Make sure the power sw
 Check the cable connection from the compu
No video display for one
AT and the
the
s

or all computers
Check video cable's connection to the computer.
 Check the monitor and computer: Switch off MCC
computers. Connect the monitor to the computer directly, boot
computer, and make sure the monitor has the proper display. If it
does not, the problem is either with your computer, or the monitor i
not compatible with your computer. If it does display, continue to the
troubleshooting below.
The monitor cannot
es not match the video outputs. If the
e
ost often with some IBM PS/2s and
e
correctly display the
video output from som
of the computers
e
monitor is a single mode type VGA, all computers must have th
same type of video output.
 (Note: this problem occurs m
 The monitor probably do
IBM 63xx, 85xx, and 95xx monitors.) The intelligent type display
card outputs video signals based on the monitor ID-pin setting in th
connector of the monitor cable. If the ID-pin setting is incorrect, the
monitor connected to the MCCAT may have no display, become
monochrome instead of color, or become unstable. If this is the
case, you will need to provide a proper ID-pattern to the display
card. Call Raritan technical support (see the last page) for help if
necessary.
All computers power
e keyboard is connected firmly to MCCAT. Disconnect
T allows hot re-connection of the
that the MCCAT with the keyboard
ed
 Make sure th
up without keyboard
error, but the keyboard
connected to MCCAT
has no control (cannot
input to any computer)
and reconnect the keyboard.
 Replace the keyboard. (MCCA
keyboard at its Keyboard port.)
 In a two-tier configuration, check
connected is the first tier.
Repeated “KB ERRO
he CIM to the computer is loose. Secure
d for a period of
R"
 The keyboard cable from t
at power-up of computer
the connection and switch on the computer again.
 If the problem occurs after MCCAT has been installe
time, and occurs on computers that have previously worked with
MCCAT, then some components are out of order. Verify that the
computer works with the keyboard when connected directly. Then
contact your dealer or Raritan for service.
After a period of
tio
ge "spike"
h
trouble-free opera
the keyboard connected
to MCCAT locks (unable
to input keystrokes)
when a particular
n,
(increase) or a "brown out" (decrease) in the power supply, whic
would cause the microprocessors in the MCCAT to malfunction. A
short-term solution to the problem is to try to recover operation by
turning the MCCAT power switch off and on. Then, if necessary,
restart all computers. The long-term method of avoiding this
 The most likely cause of the problem is either a volta