5) Select the troubleshooting procedure or RETAIN tip that applies to yourproblem:v Troubleshooting procedures are under Diagnostic.v RETAIN tips are under Troubleshoot.d. Check for and replace defective hardware.If a hardware component is not operating within specifications, it can causeunpredictable results. Most hardware failures are reported as error codes ina system or operating-system log. For more information, see“Troubleshooting tables” on page 43 and Chapter 5, “Removing andreplacing server components,” on page 169. Hardware errors are alsoindicated by light path diagnostics LEDs.A single problem might cause multiple symptoms. Follow the troubleshootingprocedure for the most obvious symptom. If that procedure does notdiagnose the problem, use the procedure for another symptom, if possible.If the problem remains, contact IBM or an approved warranty serviceprovider for assistance with additional problem determination and possiblehardware replacement. To open an online service request, go tohttp://www.ibm.com/support/electronic/. Be prepared to provide informationabout any error codes and collected data.Undocumented problemsIf you have completed the diagnostic procedure and the problem remains, theproblem might not have been previously identified by IBM. After you have verifiedthat all code is at the latest level, all hardware and software configurations are valid,and no light path diagnostics LEDs or log entries indicate a hardware componentfailure, contact IBM or an approved warranty service provider for assistance. Toopen an online service request, go to http://www.ibm.com/support/electronic/. Beprepared to provide information about any error codes and collected data and theproblem determination procedures that you have used.4 IBM System x3650 M3 Types 4255, 7945, and 7949: Problem Determination and Service Guide
