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Appendix D: Troubleshooting
1. No
power.
a. Check power cord.
b. Make sure power switch is turned ON.
c. Check cable connection from computer to SMX.
d. SMX power supply has built-in surge protection. If
you can not regain power during a power re-
cycling process, power off the unit. Wait for 15-20
seconds, then turn on again.
2. No video display for one or
all computers.
a. Check video cable's connection to the computer.
b. Check the monitor and computer. Turn off power
to SMX and the computers. Connect the monitor
to the computer directly, boot the computer, and
make sure the monitor has the proper display. If it
does not, the problem is either with your
computer, or the monitor is not compatible with
your computer. If it does display, continue to
Troubleshooting #3.
3. The monitor cannot
correctly display the video
output from some of the
computers.
a. The monitor probably does not match the video
outputs. If the monitor is a single mode type
monitor, all computers must have the same type
of video output.
4. After a period of trouble-free
operation, the keyboard
attached to SMX locks
(unable to input keystrokes)
when a particular computer
is selected, but works
normally when other
computers are selected.
a. The most likely cause of the problem is either a
voltage "spike" (increase) or a "brown out"
(decrease) in the power supply, which would
cause the microprocessors in SMX to
malfunction. A short-term solution to the problem
is to try to recover operation by turning SMX's
power switch off and on. Then, if necessary,
restart all computers. The long-term method of
avoiding this problem is to power SMX from a
UPS.
b. Check keyboard connection.
