IBM 8478 Hardware Maintenance Manual - Page 21
Diagnostics
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Chapter 3. Diagnostics 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 Chapter 7, "Symptom-to-FRU index," on page 99 for more information. Diagnostic tools overview The following tools are available to help you identify and resolve hardware-related problems: v POST beep codes 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. v Diagnostic programs and error messages The server diagnostic programs are provided on the IBM Enhanced Diagnostics CD. These programs test the major components of the server. See "Diagnostic programs and error messages" on page 13 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, the first window of the operating system or application program appears. Note: 1. If you have a power-on password or administrator password set, you must type the password and press Enter, when prompted, before POST will continue. 2. A single problem might cause several error messages. When this occurs, work to correct the cause of the first error message. After you correct the cause of the first error message, the other error messages usually will not occur the next time you run the test. © Copyright IBM Corp. 2000 11
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