IBM 8676 Hardware Maintenance Manual - Page 31
Diagnostic, tools, overview, error
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Diagnostic tools overview The following tools are available to help you identify and resolve hardware-related problems: v 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 error logs" for more information. The POST error log contains the three most recent error codes and messages that the system has generated during POST. The System Error log contains all the error messages that were issued during POST. To view the contents of the error logs, start the Configuration/Setup Utility program; then, select Error Logs from the main menu. See "Viewing the System Error log" on page 23 for more information. v 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 22 for more information. v ServerGuide error symptoms ServerGuide error symptoms are explained at "ServerGuide error symptoms" on page 25. v SCSI error messages For information on SCSI errors, see "Small computer system interface messages" on page 25 and "SCSI error codes" on page 105. v Light Path Diagnostics™ feature The server has light-emitting diodes (LEDs) to help you identify problems with server components. By following the light path, you can quickly identify the type of problem that occurred. The light path begins with the LEDs on the operator information panel ( also known as the front LED panel). See "Light Path Diagnostics" on page 26 for more information. v Error symptom charts These charts list problem symptoms, along with suggested steps to correct the problems. See the "Error symptoms" on page 89 for more information. v Customized support page You can create a customized support page that is specific to the hardware, complete with Frequently Asked Questions, Parts Information, Technical Hints and Tips, and Downloadable files. In addition, you can choose to receive electronic mail (e-mail) notifications whenever new information becomes available about the registered products. After you register and profile your xSeries products, you can diagnose problems using the IBM Online Assistant, and you can participate in the IBM discussion forum. For more detailed information about registering and creating a customized profile for your IBM products, go to the following addresses on the Web: - http://www.ibm.com/pc/register - http://www.ibm.com/pc/support POST error logs 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. Chapter 3. Diagnostics 21