IBM 419452u Installation Guide - Page 61

Memory, problems, Microprocessor

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Memory problems v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide 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. Symptom Action The amount of system memory 1. Make sure that: that is displayed is less than the amount of installed physical v No error LEDs are lit on the operator information panel. memory. v The memory modules are seated correctly. v You have installed the correct type of memory (see "Installing a memory module" on page 14). v All banks of memory are enabled. The server might have automatically disabled a memory bank when it detected a problem. 2. Check the system event/error log for error message 289 (see "Using the Configuration/Setup Utility program" on page 32); if a DIMM was disabled by a systems-management interrupt (SMI), replace the DIMM. 3. Run memory diagnostics (see "Running the diagnostic programs" in the Problem Determination and Service Guide). 4. Add one pair of DIMMs at a time, making sure that the DIMMs in each pair match. 5. Reseat the DIMMs. 6. 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 Microprocessor problems v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide 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. Symptom Action The server emits a continuous beep during POST, indicating that the microprocessor is not working correctly. 1. Correct any errors that are indicated by the LEDs (see "System-board LEDs" in the Problem Determination and Service Guide). 2. Make sure that the server supports the microprocessor. 3. (Trained service technician only) Make sure that the microprocessor is seated correctly. 4. (Trained service technician only) Replace the microprocessor. Chapter 5. Solving problems 47

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Memory
problems
v
Follow
the
suggested
actions
in
the
order
in
which
they
are
listed
in
the
Action
column
until
the
problem
is
solved.
v
See
the
parts
listing
in
the
Problem
Determination
and
Service
Guide
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.
Symptom
Action
The
amount
of
system
memory
that
is
displayed
is
less
than
the
amount
of
installed
physical
memory.
1.
Make
sure
that:
v
No
error
LEDs
are
lit
on
the
operator
information
panel.
v
The
memory
modules
are
seated
correctly.
v
You
have
installed
the
correct
type
of
memory
(see
“Installing
a
memory
module”
on
page
14).
v
All
banks
of
memory
are
enabled.
The
server
might
have
automatically
disabled
a
memory
bank
when
it
detected
a
problem.
2.
Check
the
system
event/error
log
for
error
message
289
(see
“Using
the
Configuration/Setup
Utility
program”
on
page
32);
if
a
DIMM
was
disabled
by
a
systems-management
interrupt
(SMI),
replace
the
DIMM.
3.
Run
memory
diagnostics
(see
“Running
the
diagnostic
programs”
in
the
Problem
Determination
and
Service
Guide
).
4.
Add
one
pair
of
DIMMs
at
a
time,
making
sure
that
the
DIMMs
in
each
pair
match.
5.
Reseat
the
DIMMs.
6.
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
Microprocessor
problems
v
Follow
the
suggested
actions
in
the
order
in
which
they
are
listed
in
the
Action
column
until
the
problem
is
solved.
v
See
the
parts
listing
in
the
Problem
Determination
and
Service
Guide
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.
Symptom
Action
The
server
emits
a
continuous
beep
during
POST,
indicating
that
the
microprocessor
is
not
working
correctly.
1.
Correct
any
errors
that
are
indicated
by
the
LEDs
(see
“System-board
LEDs”
in
the
Problem
Determination
and
Service
Guide
).
2.
Make
sure
that
the
server
supports
the
microprocessor.
3.
(Trained
service
technician
only)
Make
sure
that
the
microprocessor
is
seated
correctly.
4.
(Trained
service
technician
only)
Replace
the
microprocessor.
Chapter
5.
Solving
problems
47