IBM 887022X Maintenance Manual - Page 239

reconnect.

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12v bus faults These bus faults generally prohibit an orderly shutdown of the server. If the server fails, the indicator lights on the front of the server are not lit, and the server will not power-down using the power button: 1. Disconnect power cord from power source, wait 20 seconds, and reconnect. 2. Turn on the server. 3. Check error logs for one of the following error messages and take the indicated actions. 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. Error message FRU/action 12v A bus fault 1. VRM on I/O board 2. I/O board 3. Top power board 12v B bus fault 1. Memory VRM on SMP Board 2 (top) 2. SMP Board 2 (top) 3. Top power board 12v C bus fault 1. Microprocessor VRM 1 on SMP Board 2 (top) 2. Microprocessor VRM 4 on SMP Board 2 (top) 3. SMP Board 2 (top) 4. Hard disk drive (DASD) card 5. Top power board 12v D bus fault 1. Microprocessor VRM 2 on SMP Board 2 (top) 2. Microprocessor VRM 3 on SMP Board 2 (top) 3. SMP Board 2 VRM (J44) 4. SMP Board 2 (top) 5. Top power board 12v E bus fault 1. Center plane VRM 2. VRM on PCI-X board 3. Center plane 4. PCI-X board 5. Top power board 12v F bus fault 1. Memory VRM on SMP Board 1 (bottom) 2. SMP Board 1 (bottom) 3. Top power board 12v G bus fault 1. Microprocessor VRM 1 on SMP Board 1 (bottom) 2. Microprocessor VRM 4 on SMP Board 1 (bottom) 3. SMP Board 1 (bottom) 4. Top power board 12v H bus fault 1. Microprocessor VRM 2 on SMP Board 1 (bottom) 2. Microprocessor VRM 3 on SMP Board 1 (bottom 3. SMP Board 1 VRM (J44) 4. SMP Board 1 (bottom) 5. Top power board Chapter 7. Symptom-to-FRU index 229

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12v
bus
faults
These
bus
faults
generally
prohibit
an
orderly
shutdown
of
the
server.
If
the
server
fails,
the
indicator
lights
on
the
front
of
the
server
are
not
lit,
and
the
server
will
not
power-down
using
the
power
button:
1.
Disconnect
power
cord
from
power
source,
wait
20
seconds,
and
reconnect.
2.
Turn
on
the
server.
3.
Check
error
logs
for
one
of
the
following
error
messages
and
take
the
indicated
actions.
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.
Error
message
FRU/action
12v
A
bus
fault
1.
VRM
on
I/O
board
2.
I/O
board
3.
Top
power
board
12v
B
bus
fault
1.
Memory
VRM
on
SMP
Board
2
(top)
2.
SMP
Board
2
(top)
3.
Top
power
board
12v
C
bus
fault
1.
Microprocessor
VRM
1
on
SMP
Board
2
(top)
2.
Microprocessor
VRM
4
on
SMP
Board
2
(top)
3.
SMP
Board
2
(top)
4.
Hard
disk
drive
(DASD)
card
5.
Top
power
board
12v
D
bus
fault
1.
Microprocessor
VRM
2
on
SMP
Board
2
(top)
2.
Microprocessor
VRM
3
on
SMP
Board
2
(top)
3.
SMP
Board
2
VRM
(J44)
4.
SMP
Board
2
(top)
5.
Top
power
board
12v
E
bus
fault
1.
Center
plane
VRM
2.
VRM
on
PCI-X
board
3.
Center
plane
4.
PCI-X
board
5.
Top
power
board
12v
F
bus
fault
1.
Memory
VRM
on
SMP
Board
1
(bottom)
2.
SMP
Board
1
(bottom)
3.
Top
power
board
12v
G
bus
fault
1.
Microprocessor
VRM
1
on
SMP
Board
1
(bottom)
2.
Microprocessor
VRM
4
on
SMP
Board
1
(bottom)
3.
SMP
Board
1
(bottom)
4.
Top
power
board
12v
H
bus
fault
1.
Microprocessor
VRM
2
on
SMP
Board
1
(bottom)
2.
Microprocessor
VRM
3
on
SMP
Board
1
(bottom
3.
SMP
Board
1
VRM
(J44)
4.
SMP
Board
1
(bottom)
5.
Top
power
board
Chapter
7.
Symptom-to-FRU
index
229