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• See the parts listing in the Hardware Maintenance Manual to determine which components are customer
replaceable units (CRUs) and which components are eld replaceable units (FRUs).
• If an action step is preceded by “(Trained service technician only),” that step must be performed only by
a trained service technician.
Symptom Action
The number of serial ports that
are identied by the operating
system is less than the number
of installed serial ports.
1. Make sure that:
• Each port is assigned a unique address in the Setup Utility program and
none of the serial ports is disabled.
• The serial port adapter (if one is present) is seated correctly.
2. Reseat the serial port adapter.
3. Replace the serial port adapter.
A serial device does not work. 1. Make sure that:
• The device is compatible with the server.
• The serial port is enabled and is assigned a unique address.
• The device is connected to the correct connector.
2. Reseat the following components:
a. Failing serial device
b. Serial cable
3. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Failing serial device
b. Serial cable
c. (Trained service technician only) System board
Software problems
• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See the parts listing in the Hardware Maintenance Manual to determine which components are customer
replaceable units (CRUs) and which components are eld replaceable units (FRUs).
• If an action step is preceded by “(Trained service technician only),” that step must be performed only by
a trained service technician.
Symptom Action
You suspect a software
problem.
1. To determine whether the problem is caused by the software, make sure that:
• The server has the minimum memory that is needed to use the software. For
memory requirements, see the information that comes with the software.
If you have just installed an adapter or memory, the server might have a
memory-address conict.
• The software is designed to operate on the server.
• Other software works on the server.
• The software works on another server.
2. If you receive any error messages while you use the software, see the
information that comes with the software for a description of the messages and
suggested solutions to the problem.
3. Contact the software vendor.
Chapter 7. Troubleshooting 91