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 locate and correct the problem using the information in this chapter,
see Appendix A, “Getting help and technical assistance,” on page 73, the IBM
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 (POST) beep codes indicate the detection of a problem.
See “POST beep codes” and the IBM Problem Determination and Service Guide
on the IBM System x Documentation CD for more information.
v Troubleshooting tables
These tables list problem symptoms and steps to correct the problems. See
“Troubleshooting tables” on page 56 for more information.
v Light path diagnostics
Use light path diagnostics to diagnose system errors quickly. See “Light path
diagnostics” on page 68 for more information.
v Diagnostic programs and error messages
The diagnostic programs, which are stored in upgradable read-only memory
(ROM) on the system board, are the primary method of testing the major
components of the server. See the IBM Problem Determination and Service
Guide on the IBM System x Documentation CD 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.
A single problem might cause more than one error message. When this occurs,
correct the cause of the first error message. The other error messages usually will
not occur the next time POST runs.
One beep
POST was completed successfully without finding any errors.
One long beep and two short beeps
A video error has occurred, and the BIOS cannot initialize the monitor
screen to display additional information.
Other beep codes
See the Problem Determination and Service Guide on the IBM System x
Documentation CD for information about other beep codes.
© Copyright IBM Corp. 2006, 2008 53
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