IBM 8874 Installation Guide - Page 78

Microprocessor, problems, Monitor

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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 startup (boot) microprocessor is not working correctly. 1. Correct any errors indicated by the light path (see "Light path diagnostics" on page 74). 2. Make sure that all microprocessors are supported on this server, and that they all match in speed and cache size. 3. (Trained service technician only) Make sure that the microprocessor 1 is seated correctly. 4. Reseat the following components: a. (Trained service technician only) Microprocessor 1 b. Microprocessor VRM 3 or 4 c. Microprocessor tray 5. (Trained service technicians only) If there is no indication of which microprocessor has failed, isolate the error by testing with one microprocessor at a time. 6. Replace the following components one at a time, in the order shown, restarting the server each time. a. (Trained service technician only) Microprocessor 1 b. Microprocessor VRM 3 or 4 c. (Trained service technician only) Microprocessor tray 7. (Trained service technician only) If there are multiple error codes or light path diagnostics LEDs that indicate a microprocessor error, reverse the locations of two microprocessors to determine whether the error is associated with a microprocessor or with a microprocessor socket. If the error codes or LEDs indicate an error that is associated with microprocessor socket 3 or 4, reverse the locations of VRM 3 and VRM 4. v If the error is associated with a microprocessor, replace the microprocessor. v If the error is associated with a VRM, replace the VRM. v If the error is associated with a microprocessor socket, replace the microprocessor tray. Monitor problems Some IBM monitors have their own self-tests. If you suspect a problem with your monitor, see the information that comes with the monitor for instructions for testing and adjusting the monitor. If you cannot diagnose the problem, call for service. 66 IBM xSeries 460 Type 8872 and xSeries MXE 460 Type 8874: Installation Guide ERserver

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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
startup
(boot)
microprocessor
is
not
working
correctly.
1.
Correct
any
errors
indicated
by
the
light
path
(see
“Light
path
diagnostics”
on
page
74).
2.
Make
sure
that
all
microprocessors
are
supported
on
this
server,
and
that
they
all
match
in
speed
and
cache
size.
3.
(Trained
service
technician
only)
Make
sure
that
the
microprocessor
1
is
seated
correctly.
4.
Reseat
the
following
components:
a.
(Trained
service
technician
only)
Microprocessor
1
b.
Microprocessor
VRM
3
or
4
c.
Microprocessor
tray
5.
(Trained
service
technicians
only)
If
there
is
no
indication
of
which
microprocessor
has
failed,
isolate
the
error
by
testing
with
one
microprocessor
at
a
time.
6.
Replace
the
following
components
one
at
a
time,
in
the
order
shown,
restarting
the
server
each
time.
a.
(Trained
service
technician
only)
Microprocessor
1
b.
Microprocessor
VRM
3
or
4
c.
(Trained
service
technician
only)
Microprocessor
tray
7.
(Trained
service
technician
only)
If
there
are
multiple
error
codes
or
light
path
diagnostics
LEDs
that
indicate
a
microprocessor
error,
reverse
the
locations
of
two
microprocessors
to
determine
whether
the
error
is
associated
with
a
microprocessor
or
with
a
microprocessor
socket.
If
the
error
codes
or
LEDs
indicate
an
error
that
is
associated
with
microprocessor
socket
3
or
4,
reverse
the
locations
of
VRM
3
and
VRM
4.
v
If
the
error
is
associated
with
a
microprocessor,
replace
the
microprocessor.
v
If
the
error
is
associated
with
a
VRM,
replace
the
VRM.
v
If
the
error
is
associated
with
a
microprocessor
socket,
replace
the
microprocessor
tray.
Monitor
problems
Some
IBM
monitors
have
their
own
self-tests.
If
you
suspect
a
problem
with
your
monitor,
see
the
information
that
comes
with
the
monitor
for
instructions
for
testing
and
adjusting
the
monitor.
If
you
cannot
diagnose
the
problem,
call
for
service.
66
IBM
ERserver
xSeries
460
Type
8872
and
xSeries
MXE
460
Type
8874:
Installation
Guide