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 140.
b. Turn off the server and all external devices.
c. Check all internal and external devices for compatibility at
http://www.ibm.com/servers/eserver/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 tables”
on page 123.
h. Check the system-error LED on the operator information panel. If it is
flashing, check the light path diagnostics LEDs (see “Light path diagnostics”
on page 136).
i. Check for the following results:
v Successful completion of POST (see “POST” on page 99 for more
information)
v Successful completion of startup
3. Did one or more beeps sound?
v No: Find the failure symptom in “Troubleshooting tables” on page 123; if
necessary, run the diagnostic programs (see “Running the diagnostic
programs” on page 142).
– If you receive an error, see “Diagnostic error codes” on page 144.
– If the diagnostic programs were completed successfully and you still
suspect a problem, see “Solving undetermined problems” on page 166.
v Yes: Find the beep code in “POST beep codes” on page 99; if necessary,
see “Solving undetermined problems” on page 166.
122 IBM System x3550 Type 7978 and 1913: Problem Determination and Service Guide
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