IBM LS20 - BladeCenter - 8850 Service Manual page 25

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, Type 8850," on page 53 to determine which components are customer
replaceable units (CRU) and which components are field replaceable units (FRU).
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
1-2-2
1-2-3
1-2-4
1-3-1
1-3-2
2-1-1
2-1-2
2-1-3
2-1-4
2-2-1
Description
DMA initialization failed.
DMA page register write/read failed.
RAM refresh verification failed.
First 64K RAM test failed.
First 64K RAM parity test failed.
Secondary DMA register failed.
Primary DMA register failed.
Primary interrupt mask register failed.
Secondary interrupt mask register failed. (Trained service technician only) Replace the
Interrupt vector loading failed.
Action
(Trained service technician only) Replace the
system board assembly.
(Trained service technician only) Replace the
system board assembly.
1. Reseat the DIMMs.
2. Replace the following components one at a
time, in the order shown, restarting the
server each time.
a. DIMMs
b. (Trained service technician only) System
board assembly
1. Reseat the DIMMs.
2. Replace the following components one at a
time, in the order shown, restarting the
server each time.
a. DIMMs
b. (Trained service technician only) System
board assembly
1. Reseat the DIMMs.
2. Replace the following components one at a
time, in the order shown, restarting the
server each time.
a. DIMMs
b. (Trained service technician only) System
board assembly
(Trained service technician only) Replace the
system board assembly.
(Trained service technician only) Replace the
system board assembly.
(Trained service technician only) Replace the
system board assembly.
system board assembly.
(Trained service technician only) Replace the
system board assembly.
Chapter 2. Diagnostics
11