v For information about power-supply problems, see “Solving power problems”on page 146 and “Power-supply LEDs” on page 20.v For intermittent problems, check the event log; see “Event logs” on page 124 andAppendix C, “DSA diagnostic test results,” on page 611.Performing the checkout procedureUse this information to perform the checkout procedure.About this taskTo perform the checkout procedure, complete the following steps:Procedure1. Is the server part of a cluster?v No: Go to step 2.v Yes: Shut down all failing servers that are related to the cluster. Go to step 2.2. Complete the following steps:a. Check the power supply LEDs (see “Power-supply LEDs” on page 20).b. Turn off the server and all external devices.c. Check all internal and external devices for compatibility athttp://www.ibm.com/systems/info/x86servers/serverproven/compat/us/.d. Check all cables and power cords.e. Set all display controls to the middle positions.f. Turn on all external devices.g. Turn on the server. If the server does not start, see “Troubleshooting bysymptom” on page 131.h. Check the system-error LED on the operator information panel. If it isflashing, check the light path diagnostics LEDs (see “Light path diagnostics”on page 122).Note: When you slide the light path diagnostics panel out of the server tocheck the LEDs or checkpoint codes, do not run the server continuouslywith light path diagnostics panel outside of the server. The panel shouldonly be outside of the server a short time. The light path diagnostics panelmust remain in the server when the server is running to ensure propercooling.i. Check for the following results:v Successful completion of POST (see “UEFI/POST” on page 127 for moreinformation)v Successful completion of startup, which is indicated by a readable displayof the operating-system desktop3. Is there a readable image on the monitor screen?v No: Find the failure symptom in “Troubleshooting by symptom” on page131; if necessary, see “Solving undetermined problems” on page 148.v Yes: Run DSA (see “Running the DSA Preboot diagnostic programs” on page129).– If DSA reports an error, follow the instructions in Appendix C, “DSAdiagnostic test results,” on page 611.– If DSA does not report an error but you still suspect a problem, see“Solving undetermined problems” on page 148.Chapter 4. Troubleshooting 119
