Chapter 2. DiagnosticsThis chapter describes the diagnostic tools that are available to help you solveproblems that might occur in the server.If you cannot locate and correct the problem using the information in this chapter,see “Getting help and technical assistance” on page 183 for more information.Diagnostic toolsThe following tools are available to help you diagnose and solve hardware-relatedproblems:v POST beep codes, error messages, and error logsThe power-on self-test (POST) generates beep codes and messages to indicatesuccessful test completion or the detection of a problem. See “POST” for moreinformation.v Troubleshooting tablesThese tables list problem symptoms and actions to correct the problems. See“Troubleshooting tables” on page 41.v Server LEDsUse the LEDs on the server to diagnose system errors quickly. See “Error LEDs”on page 55 for more information.v Diagnostic programs, messages, and error messagesThe diagnostic programs are the primary method of testing the majorcomponents of the server. The diagnostic programs are on the IBM EnhancedDiagnostics CD that comes with the server. See “Diagnostic programs,messages, and error codes” on page 58 for more information.POSTWhen you turn on the server, it performs a series of tests to check the operation ofthe server components and some optional devices in the server. This series of testsis called the power-on self-test, or POST.If a power-on password is set, you must type the password and press Enter, whenprompted, for POST to run.If POST is completed without detecting any problems, a single beep sounds, andthe server startup is completed.If POST detects a problem, more than one beep might sound, or an error messageis displayed. See “POST beep codes” on page 18 and “POST error codes” on page24 for more information.© Copyright IBM Corp. 2006 17
