IBM 887022X Maintenance Manual - Page 220

self-explanatory.

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Note: See Chapter 8, "Parts listing, Type 8870," on page 249 to determine which components are replaceable by the customer, and which components should be replaced by an IBM field service technician. Service Processor message FRU/action Upper CEC Scalability Controller Machine Check: xxx 1. Refer to previous log entries. 2. Examine the Light Path indicators to determine if the error was caused by a microprocessor or a DIMM. 3. Verify that all scalability cables are firmly attached. 4. Run diagnostic programs. 5. Replace component indicated by Light Path indicators. 6. Scalability cables. 7. Upper SMP Module. Upper to Lower SMP Expansion Module cable not detected 1. Cable between SMP1 and SMP2 2. SMP Expansion board VRM x Power Good Fault 1. Follow the Light Path indicators to determine the failing component. 2. Verify that the system power present indicator is ON (see "Center plane connectors, jumpers and LEDs" on page 159). 3. Failing VRM. 4. Board containing indicated failing VRM. 5. If the system power present indicator is OFF: a. Power backplane b. Power supplies The service processor also generates a large number of information, error and warning messages. If an RXE-100 unit is attached, the service processor may generate further messages specific to this unit. These are listed in the following table and are intended to be self-explanatory. 210 xSeries 445 Type 8870: Hardware Maintenance Manual and Troubleshooting Guide

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Note:
See
Chapter
8,
“Parts
listing,
Type
8870,”
on
page
249
to
determine
which
components
are
replaceable
by
the
customer,
and
which
components
should
be
replaced
by
an
IBM
field
service
technician.
Service
Processor
message
FRU/action
Upper
CEC
Scalability
Controller
Machine
Check:
xxx
1.
Refer
to
previous
log
entries.
2.
Examine
the
Light
Path
indicators
to
determine
if
the
error
was
caused
by
a
microprocessor
or
a
DIMM.
3.
Verify
that
all
scalability
cables
are
firmly
attached.
4.
Run
diagnostic
programs.
5.
Replace
component
indicated
by
Light
Path
indicators.
6.
Scalability
cables.
7.
Upper
SMP
Module.
Upper
to
Lower
SMP
Expansion
Module
cable
not
detected
1.
Cable
between
SMP1
and
SMP2
2.
SMP
Expansion
board
VRM
x
Power
Good
Fault
1.
Follow
the
Light
Path
indicators
to
determine
the
failing
component.
2.
Verify
that
the
system
power
present
indicator
is
ON
(see
“Center
plane
connectors,
jumpers
and
LEDs”
on
page
159).
3.
Failing
VRM.
4.
Board
containing
indicated
failing
VRM.
5.
If
the
system
power
present
indicator
is
OFF:
a.
Power
backplane
b.
Power
supplies
The
service
processor
also
generates
a
large
number
of
information,
error
and
warning
messages.
If
an
RXE-100
unit
is
attached,
the
service
processor
may
generate
further
messages
specific
to
this
unit.
These
are
listed
in
the
following
table
and
are
intended
to
be
self-explanatory.
210
xSeries
445
Type
8870:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide