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 110).
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 84.
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 101).
Note: When you slide the light path diagnostics panel out of the server to
check the LEDs or checkpoint codes, do not run the server continuously
with light path diagnostics panel outside of the server. The panel should only
be outside of the server a short time. The light path diagnostics panel must
remain in the server when the server is running to ensure proper cooling.
i. Check for the following results:
v Successful completion of POST (see “POST” on page 24 for more
information)
v Successful completion of startup
Chapter 3. Diagnostics 83
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