IBM LS21 - BladeCenter - 7971, Service Manual

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v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v
See Chapter 3, “Parts listing, Types 7971 and 7972,” on page 59 to determine which components are CRUs
and which components are FRUs.
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Beep code Description Action
1-2-4 RAM refresh verification failed.
1. Reseat the following components:
a. DIMMs
b. MPE unit (if one is installed)
2. Replace the following components one at a
time, in the order shown, restarting the
blade server each time:
a. DIMMs
b. (Trained service technician only) System
board assembly
c. (Trained service technician only) MPE
board assembly (if one is installed)
1-3-1 First 64K RAM test failed.
1. Reseat the DIMMs.
2. Replace the following components one at a
time, in the order shown, restarting the
blade server each time:
a. DIMMs
b. (Trained service technician only) System
board assembly
2-1-1 Secondary DMA register test failed. (Trained service technician only) Replace the
system board assembly.
2-1-2 Primary DMA register test failed. (Trained service technician only) Replace the
system board assembly.
2-1-3 Primary interrupt mask register test
failed.
(Trained service technician only) Replace the
system board assembly.
2-1-4 Secondary interrupt mask register test
failed.
(Trained service technician only) Replace the
system board assembly.
2-2-2 Keyboard controller test failed.
1. Check the function of the shared
BladeCenter unit resources (see “Solving
shared BladeCenter resource problems” on
page 52).
2. (Trained service technician only) Replace
the system board assembly.
2-3-1 Screen initialization failed. (Trained service technician only) Replace the
system board assembly.
3-1-1 Timer tick interrupt failed. (Trained service technician only) Replace the
system board assembly.
3-1-2 Interval timer channel 2 failed. (Trained service technician only) Replace the
system board assembly.
Chapter 2. Diagnostics
13