IBM XSERIES 220 manual Diagnostic tools overview, Post beep codes, error messages, and error logs

Diagnostics

Diagnostic tools overview . . . . . . . . . . . . . . . . . . . . 11 POST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 POST beep codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 POST error messages . . . . . . . . . . . . . . . . . . . . . . . . 12 POST error log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Small computer system interface messages . . . . . 12 Diagnostic programs and error messages . . . . . . . 13 Text messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Starting the diagnostic programs . . . . . . . . . . . . . . 14 Viewing the test log. . . . . . . . . . . . . . . . . . . . . . . . . . 15 Diagnostic error messages . . . . . . . . . . . . . . . . . . . . 15

Power checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Recovering BIOS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Identifying problems using status LEDs. . . . . . . . 17 Front panel and system board LEDs . . . . . . . . . . . 18 Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Replacing the battery . . . . . . . . . . . . . . . . . . . . . . . . 19 Temperature checkout . . . . . . . . . . . . . . . . . . . . . . . 20 Diagnosing errors . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Troubleshooting the Ethernet controller . . . . . . . . 21 Ethernet controller messages . . . . . . . . . . . . . . . . . 23

This section provides basic troubleshooting information to help you resolve some common problems that might occur with the server.

If you cannot locate and correct the problem using the information in this section, refer to “Symptom-to-FRU index” on page 111 for more information.

Diagnostic tools overview

The following tools are available to help you identify and resolve hardware-related problems:

•POST beep codes, error messages, and error logs

The power-on self-test (POST) generates beep codes and messages to indicate successful test completion or the detection of a problem. See “POST” for more information.

•Diagnostic programs and error messages

The server diagnostic programs are stored in upgradable read-only memory (ROM) on the system board. These programs are the primary method of testing the major components of the server. See “Diagnostic programs and error messages” on page 13 for more information.

•Error symptoms

These charts list problem symptoms, along with suggested steps to correct the problems. See “Diagnosing errors” on page 21 for more information.

•Diagnostic LEDs

The server has light-emitting diodes (LEDs) to help you identify problems with server components. These LEDs are part of the diagnostics that are built into the server. See “Diagnostic LEDs” on page 18 for more information.

POST

When you turn on the server, it performs a series of tests to check the operation of server components and some of the options installed in the server. This series of tests is called the power-on self-test or POST.

If POST finishes without detecting any problems, a single beep sounds and the first screen of the operating system or application program appears.

© Copyright IBM Corp. 2000 11