Specifications

Serial port problems

Symptom FRU/action

The number of serial ports

identified by the operating

system is less than the number

of serial ports that are installed.

1. Make sure that:

v Each port is assigned a unique address in the Configuration/Setup Utility

program and none of the serial ports is disabled.

v The serial-port adapter, if you installed one, is seated properly.

Failing serial port adapter.

A serial device does not work.

1. Make sure that:

v The device is compatible with the computer.

v The serial port is enabled and is assigned a unique address.

v The device is connected to the correct port (see “Input/output connectors” on

page 69).

Failing serial device.

3. Serial adapter, if installed.

4. System board.

Software problem

Symptom FRU/action

You suspect a software

problem.

1. To determine whether problems are caused by the software, make that:

v The computer has the minimum memory needed to use the software. For

memory requirements, see the information that comes with the software.

Note: If you have just installed an adapter or memory, the computer might

have a memory address conflict.

v The software is designed to operate on the computer.

v Other software works on the computer.

v The software that you are using works on another computer.

If you received any error messages when using the software, see the

information that comes with the software for a description of the messages and