IBM 866631Y Hardware Maintenance Manual - Page 21

Diagnostics Diagnostic tools overview 11 POST 11 POST beep codes 12 POST error messages 12 Event/error logs 12 Small computer system interface messages . . . . 12 Diagnostic programs and error messages . . . . 12 Text messages 13 Starting the diagnostic programs 14 Viewing the test log 15 Diagnostic error message tables 15 Light path diagnostics 15 Power supply LEDs 15 Diagnostic panel LEDs 16 Light path diagnostics 17 Power checkout 19 Temperature checkout 20 Recovering BIOS 20 Replacing the battery 21 Diagnosing errors 22 Troubleshooting the Ethernet controller . . . . 23 Network connection problems 23 Ethernet controller troubleshooting chart . . 23 Ethernet controller messages 25 Novell NetWare or IntraNetWare server ODI driver messages 25 NDIS 4.0 (Windows NT) driver messages . . 27 UNIX messages 28 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 119 for more information. 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" 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 12 for more information. v Light path diagnostics Your server has light-emitting diodes (LEDs) to help you identify problems with server components. These LEDs are part of the light-path diagnostics that are built into the server. By following the path of lights, you can quickly identify the type of system error that occurred. See "Light path diagnostics" on page 15 for more information. v Error symptoms These charts list problem symptoms, along with suggested steps to correct the problems. See the "Diagnosing errors" on page 22 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. © Copyright IBM Corp. 1999 11