microprocessor socket. See “Microprocessor problems” on page 49 forinformation about diagnosing microprocessor problems.v Before you run the diagnostic programs, you must determine whether the failingserver is part of a shared hard disk drive cluster (two or more servers sharingexternal storage devices). If it is part of a cluster, you can run all diagnosticprograms except the ones that test the storage unit (that is, a hard disk drive inthe storage unit) or the storage adapter that is attached to the storage unit. Thefailing server might be part of a cluster if any of the following conditions is true:– You have identified the failing server as part of a cluster (two or more serverssharing external storage devices).– One or more external storage units are attached to the failing server and atleast one of the attached storage units is also attached to another server orunidentifiable device.– One or more servers are located near the failing server.Important: If the server is part of a shared hard disk drive cluster, run one testat a time. Do not run any suite of tests, such as “quick” or “normal” tests,because this might enable the hard disk drive diagnostic tests.v In a two-node configuration, be sure to check the LEDs and view the logs onboth servers to determine whether the error occurred on the primary orsecondary server.v If the server is halted and a POST error code is displayed, see Appendix C,“UEFI/POST error codes,” on page 1013. If the server is halted and no errormessage is displayed, see “Troubleshooting tables” on page 42 and “Solvingundetermined problems” on page 77.v For information about power-supply problems, see “Power problems” on page53 and “Power-supply LEDs” on page 69.v For intermittent problems, check the event logs; see “Event logs” on page 38 and“IBM Dynamic System Analysis” on page 71.Performing the checkout procedureThis topic provides instructions on how to perform the checkout procedure todiagnose problems with the server.About this taskTo perform the checkout procedure, complete the following steps:Procedure1. Is the server part of a cluster?v No: Go to step “Performing the checkout procedure.”v Yes: Shut down all failing servers that are related to the cluster. Go to step“Performing the checkout procedure.”2. Complete the following steps:a. Check the power-supply LEDs (see “Power-supply LEDs” on page 69).b. Turn off the server and all external devices.c. Check all internal and external devices for compatibility (seehttp://www.ibm.com/systems/info/x86servers/serverproven/compat/us/for additional information).d. Check all cables and power cords.e. Set all monitor controls to the middle positions.Chapter 3. Diagnostics 41
