IBM x3755 Installation Guide - Page 62

Serial port problems

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v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v 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 server unexpectedly shuts down, and the LEDs on the operator information panel are not lit. See the Problem Determination and Service Guide on the IBM System x Documentation CD for more information. Serial port problems v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v 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 identified by the operating system is less than the number of installed serial ports. Make sure that each port is assigned a unique address in the Configuration/Setup Utility program and that none of the serial ports is disabled. A serial device does not work. 1. Make sure that: v The device is compatible with the server. v The serial port is enabled and is assigned a unique address. v The device is connected to the correct connector (see Chapter 3, "Server controls, connectors, LEDs, and power," on page 23). 2. Reseat the following components: a. Failing serial device b. Serial cable c. Remote Supervisor Adapter II SlimLine (if one is present) 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. Remote Supervisor Adapter II SlimLine (if one is present) d. (Trained service technician only) I/O board 50 IBM System x3755 Types 8877 and 7163: Installation Guide

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v
Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v
See the parts listing in the
Problem Determination and Service Guide
to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v
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 server unexpectedly shuts
down, and the LEDs on the
operator information panel are
not lit.
See the
Problem Determination and Service Guide
on the IBM
System x
Documentation
CD for more information.
Serial port problems
v
Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v
See the parts listing in the
Problem Determination and Service Guide
to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v
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 identified by the operating
system is less than the number
of installed serial ports.
Make sure that each port is assigned a unique address in the Configuration/Setup
Utility program and that none of the serial ports is disabled.
A serial device does not work.
1.
Make sure that:
v
The device is compatible with the server.
v
The serial port is enabled and is assigned a unique address.
v
The device is connected to the correct connector (see Chapter 3, “Server
controls, connectors, LEDs, and power,” on page 23).
2.
Reseat the following components:
a.
Failing serial device
b.
Serial cable
c.
Remote Supervisor Adapter II SlimLine (if one is present)
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.
Remote Supervisor Adapter II SlimLine (if one is present)
d.
(Trained service technician only) I/O board
50
IBM System x3755 Types 8877 and 7163: Installation Guide