Unisys Aquanta CP Series Configuration Manual page 48

Troubleshooting
Table 3–1. Troubleshooting Guide (cont.)
Problem
The fan at the back of my system
does not rotate.
My system unit's Power LED does
not light.
The monitor screen is dark when I
turn on the power.
3–8
Solution
Make sure the power outlet is live.
Make sure both ends of the system unit power cable are
plugged in and securely connected.
Make sure the power on/off cable is properly connected to
CN1.
With the power off, remove all feature boards and
disconnect all internal drives. Turn on the system. If the
problem does not recur, one of the devices you removed
was the cause of the problem. Replace each device one at
a time, testing the system after each device is reconnected.
When the problem recurs, you have found the failing
device.
Check the system unit fan. If the fan is rotating and the
system is running normally otherwise, the Power LED may
be defective. Contact your Unisys Customer Service
Engineer for help.
If the system is not running normally, make sure the power
outlet is live.
Make sure both ends of the system unit power cable are
plugged in and securely connected.
Make sure the power on/off cable is properly connected to
CN1.
With the power off, remove all feature boards and
disconnect all internal drives. Turn on the system. If the
problem does not recur, one of the devices you removed
was the cause of the problem. Replace each device one at
a time, testing the system after each device is reconnected.
When the problem recurs, you have found the failed device.
Make sure the monitor power cable is plugged into a power
source (system unit or wall socket).
Check the monitor interface cable and make sure both
ends are properly connected.
Try turning the monitor brightness and contrast controls to
their maximum settings.
Make sure the SAZ socket is fully closed and the CPU is
properly seated
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