IBM 887022X Maintenance Manual - Page 216

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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 System Power Good Fault 1. Refer to previous log entries. 2. Verify that the Light Path card indicates a power supply error. 3. Verify that the ac/dc lights on the power supplies are ON. 4. Verify that the system power present indicator is ON (see "Center plane connectors, jumpers and LEDs" on page 159). 5. If the system power present indicator is OFF: a. Power backplane b. Power supplies 6. Failing component indicated by Light Path. 7. VRMs on failing board indicated by the Light Path. System shutoff due to +12V over voltage 1. Power backplane 2. Power supplies System shutoff due to +2.5V over voltage 1. Center plane VRM 2. VRM (J28) on Lower SMP Module 3. VRM (J28) on Upper SMP Module System shutoff due to +2.5V under voltage 1. Failing component indicated by Light Path 2. Center plane VRM 3. VRM (J28) on Lower SMP Module 4. VRM (J28) on Upper SMP Module System shutoff due to 1.8V CPU over voltage 1. Failing component indicated by Light Path 2. Failing microprocessor VRM 3. Microprocessor System shutoff due to 1.8V CPU under voltage 1. Failing component indicated by Light Path 2. Failing microprocessor VRM 3. Microprocessor System shutoff due to 12V under voltage 1. Power backplane 2. Power supplies System shutoff due to 3.3V PCI over voltage 1. Remove PCI adapters and reinstall one at a time, restarting the server each time, to isolate failing adapter. 2. PCI-X VRM. 3. PCI-X Board. 4. I/O Board VRM. 5. I/O Board. System shutoff due to 3.3V PCI under voltage 1. Remove PCI adapters and reinstall one at a time, restarting the server each time, to isolate failing adapter. 2. PCI-X VRM. 3. PCI-X Board. 206 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
System
Power
Good
Fault
1.
Refer
to
previous
log
entries.
2.
Verify
that
the
Light
Path
card
indicates
a
power
supply
error.
3.
Verify
that
the
ac/dc
lights
on
the
power
supplies
are
ON.
4.
Verify
that
the
system
power
present
indicator
is
ON
(see
“Center
plane
connectors,
jumpers
and
LEDs”
on
page
159).
5.
If
the
system
power
present
indicator
is
OFF:
a.
Power
backplane
b.
Power
supplies
6.
Failing
component
indicated
by
Light
Path.
7.
VRMs
on
failing
board
indicated
by
the
Light
Path.
System
shutoff
due
to
+12V
over
voltage
1.
Power
backplane
2.
Power
supplies
System
shutoff
due
to
+2.5V
over
voltage
1.
Center
plane
VRM
2.
VRM
(J28)
on
Lower
SMP
Module
3.
VRM
(J28)
on
Upper
SMP
Module
System
shutoff
due
to
+2.5V
under
voltage
1.
Failing
component
indicated
by
Light
Path
2.
Center
plane
VRM
3.
VRM
(J28)
on
Lower
SMP
Module
4.
VRM
(J28)
on
Upper
SMP
Module
System
shutoff
due
to
1.8V
CPU
over
voltage
1.
Failing
component
indicated
by
Light
Path
2.
Failing
microprocessor
VRM
3.
Microprocessor
System
shutoff
due
to
1.8V
CPU
under
voltage
1.
Failing
component
indicated
by
Light
Path
2.
Failing
microprocessor
VRM
3.
Microprocessor
System
shutoff
due
to
12V
under
voltage
1.
Power
backplane
2.
Power
supplies
System
shutoff
due
to
3.3V
PCI
over
voltage
1.
Remove
PCI
adapters
and
reinstall
one
at
a
time,
restarting
the
server
each
time,
to
isolate
failing
adapter.
2.
PCI-X
VRM.
3.
PCI-X
Board.
4.
I/O
Board
VRM.
5.
I/O
Board.
System
shutoff
due
to
3.3V
PCI
under
voltage
1.
Remove
PCI
adapters
and
reinstall
one
at
a
time,
restarting
the
server
each
time,
to
isolate
failing
adapter.
2.
PCI-X
VRM.
3.
PCI-X
Board.
206
xSeries
445
Type
8870:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide