IBM LS20 - BladeCenter - 8850 Service Manual page 27

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
3-1-1
3-1-2
3-1-3
3-1-4
3-2-1
3-2-3
3-2-4
Description
Timer tick interrupt failed.
Interval timer channel 2 failed.
RAM test failed above address 0FFFFh.
Time-of-day clock failed.
Serial port failed.
Math coprocessor test failed
Failure comparing CMOS memory size
against actual
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 battery.
2. Replace the following components one at a
time, in the order shown, restarting the
server each time.
a. Battery
b. (Trained service technician only) System
board assembly
(Trained service technician only) Replace the
system board assembly.
1. (Trained service technician only) Reseat the
microprocessor.
2. Replace the following components one at a
time, in the order shown, restarting the
server each time.
a. (Trained service technician only)
Microprocessor
b. (Trained service technician only) System
board assembly
1. Reseat the following components:
a. DIMMs
b. Battery
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
c. Battery
Chapter 2. Diagnostics
13