IBM 8840 Hardware Maintenance Manual - Page 103

Memory, error, symptoms, Microprocessor, Monitor

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Memory error symptoms Note: See "System" on page 108 to determine which components should be replaced by a field service technician. Symptom FRU/action The amount of system memory displayed is less than the amount of physical memory installed. 1. Verify that: v Memory mirroring is not enabled. v The memory modules are seated properly. v You have installed the correct type of memory. v If you changed the memory, you updated the memory configuration with the Configuration/Setup Utility program. v All banks of memory on the DIMMs are enabled. The server might have automatically disabled a DIMM bank when it detected a problem or a DIMM bank could have been manually disabled. 2. Check POST error log for error message 289: v If the DIMM was disabled by a system-management interrupt (SMI), replace the DIMM. v If the DIMM was disabled by the user or by POST: a. Start the Configuration/Setup Utility program. b. Enable the DIMM. c. Save the configuration and restart the server. 3. DIMM. 4. System board. Microprocessor error symptoms Note: See "System" on page 108 to determine which components should be replaced by a field service technician. Symptom FRU/action The server emits a continuous tone during POST. (The startup (boot) microprocessor is not working properly.) 1. Verify that the startup microprocessor is seated properly. 2. Startup microprocessor. Monitor error symptoms Note: See "System" on page 108 to determine which components should be replaced by a field service technician. Symptom FRU/action Monitor problems (general). Some IBM monitors have their own self-tests. If you suspect a problem with the monitor, refer to the information that comes with the monitor for adjusting and testing instructions. 1. Monitor. 2. Run video diagnostics. If diagnostics pass, the problem may be a video driver. 3. Display adapter / system board. Chapter 6. Symptom-to-FRU index 93

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Memory
error
symptoms
Note:
See
“System”
on
page
108
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Symptom
FRU/action
The
amount
of
system
memory
displayed
is
less
than
the
amount
of
physical
memory
installed.
1.
Verify
that:
v
Memory
mirroring
is
not
enabled.
v
The
memory
modules
are
seated
properly.
v
You
have
installed
the
correct
type
of
memory.
v
If
you
changed
the
memory,
you
updated
the
memory
configuration
with
the
Configuration/Setup
Utility
program.
v
All
banks
of
memory
on
the
DIMMs
are
enabled.
The
server
might
have
automatically
disabled
a
DIMM
bank
when
it
detected
a
problem
or
a
DIMM
bank
could
have
been
manually
disabled.
2.
Check
POST
error
log
for
error
message
289:
v
If
the
DIMM
was
disabled
by
a
system-management
interrupt
(SMI),
replace
the
DIMM.
v
If
the
DIMM
was
disabled
by
the
user
or
by
POST:
a.
Start
the
Configuration/Setup
Utility
program.
b.
Enable
the
DIMM.
c.
Save
the
configuration
and
restart
the
server.
3.
DIMM.
4.
System
board.
Microprocessor
error
symptoms
Note:
See
“System”
on
page
108
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Symptom
FRU/action
The
server
emits
a
continuous
tone
during
POST.
(The
startup
(boot)
microprocessor
is
not
working
properly.)
1.
Verify
that
the
startup
microprocessor
is
seated
properly.
2.
Startup
microprocessor.
Monitor
error
symptoms
Note:
See
“System”
on
page
108
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Symptom
FRU/action
Monitor
problems
(general).
Some
IBM
monitors
have
their
own
self-tests.
If
you
suspect
a
problem
with
the
monitor,
refer
to
the
information
that
comes
with
the
monitor
for
adjusting
and
testing
instructions.
1.
Monitor.
2.
Run
video
diagnostics.
If
diagnostics
pass,
the
problem
may
be
a
video
driver.
3.
Display
adapter
/
system
board.
Chapter
6.
Symptom-to-FRU
index
93