IBM 79856au Installation Guide - Page 71
Solving, problems
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Chapter 5. Solving problems This chapter provides basic troubleshooting information to help you solve some common problems that might occur while you are setting up the server. If you cannot diagnose and correct problems using the information in this chapter, see Appendix A, "Getting help and technical assistance," on page 77, the Problem Determination and Service Guide on the IBM System x Documentation CD, and the "Server Support" flowchart in the front of this document. Diagnostic tools overview The following tools are available to help you diagnose and solve hardware-related problems: v POST beep codes The power-on self-test beep codes indicate the detection of a problem. - One beep indicates successful completion of POST, with no errors. - More than one beep indicates that POST detected a problem. Error messages are displayed also if POST detects a hardware-configuration problem. See "POST beep codes" and the Problem Determination and Service Guide on the IBM System x Documentation CD for more information. v Troubleshooting tables These tables list problem symptoms and actions to correct the problems. See "Troubleshooting tables" on page 61 for more information. v Diagnostic programs and error messages The system diagnostic programs are provided in ROM. These programs test the major components of the server. See the Problem Determination and Service Guide on the IBM System x Documentation CD for more information. v Light path diagnostics Use light path diagnostics to diagnose system errors quickly. See "Light path diagnostics" on page 73 for more information. POST beep codes POST emits one beep to signal successful completion. If POST detects a problem during startup, other beep codes might occur. Use the following beep code descriptions to help diagnose and solve problems that are detected during startup. Note: See the Problem Determination and Service Guide on the IBM System x Documentation CD for more information about the POST beep codes. One beep POST was completed successfully without finding any errors. Repeating long beeps A memory error has occurred. Make sure that all DIMMs are correctly installed. One long beep and two short beeps A video error has occurred, and the BIOS cannot initialize the monitor screen to display additional information. © Copyright IBM Corp. 2007 57