IBM xSeries 236 8841, User Manual

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Note: See “System replaceable units” on page 144 to determine which components should be replaced by a field
service technician.
Beep/symptom FRU/action
Three short beeps
1. Reseat the DIMMs.
2. Locate the failing DIMMs:
a. Remove all DIMMs from the server.
b. Beginning with the primary bank of DIMMs, return one bank of DIMMs
to the server at a time, restarting the server each time, until the beep
code error returns.
c. Replace one pair of DIMMs at a time in the failing bank with an
identical pair of known good DIMMs, restarting the server after each
pair, until the beep code error returns.
d. Replace one DIMM at a time in the failing pair with an identical known
good DIMM, restarting the server after each DIMM, to identify the failed
DIMM. If the beep code error remains after you have replaced both
DIMMs, go to step 3b.
e. Repeat steps 2b through 2d until you have checked all memory banks.
3. Replace the following components, one at a time, in the order shown:
a. DIMMs
b. (Trained service technician only) System board
One continuous beep
1. Reseat the following components, one at a time, in the order shown,
restarting the server each time:
v (Trained service technician only) Microprocessor 1
v (Trained service technician only) Microprocessor 2 (if installed)
2. (Trained service technician only) Remove microprocessor 2 and its VRM
and restart the server.
v
If no beep code occurs, microprocessor 2 might have failed; replace the
microprocessor.
v If the beep code remains, remove microprocessor 1 and install
microprocessor 2 in the connector for microprocessor 1; then, restart the
server. If no beep code occurs, microprocessor 1 might have failed;
replace the microprocessor.
3. Replace the following components, one at a time, in the order shown,
restarting the server each time:
v
(Trained service technician only) Microprocessor 1
v
(Trained service technician only) Microprocessor 2 (if installed)
v
(Trained service technician only) System board
Repeating short beeps
1. Keyboard
2. System board
One long and one short beep
1. Video adapter (if installed)
2. System board
One long and two short beeps
1. Video adapter (if installed)
2. System board
One long and three short beeps
1. Monitor
2. Video adapter, if installed
3. System board
Two long and two short beeps
v
Video adapter
Chapter 6. Symptom-to-FRU index
107