IBM 8676 Hardware Maintenance Manual - Page 119

fault, messages, Undetermined, problems

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Bus fault messages Note: See "System" on page 112 to determine which components should be replaced by a field service technician. Bus fault messages Message Action Failure reading 12C device. Check devices on bus 0. 1. If installed, reseat the I2C cable between Remote Supervisor Adapter (in PCI slot 1/J1) and system board (J2). 2. Memory DIMMs. 3. System board. Failure reading 12C device. Check devices on bus 1. 1. Reseat the I2C cable between the operator information panel and system board (J10). 2. Operator information card. 3. System board. Failure reading 12C device. Check devices on bus 2. 1. Reseat the cable between system board and the power supply. 2. Power supply. 3. System board. Failure reading 12C device. Check devices on bus 3. 1. Reseat the cable between the SCSI backplane and connector (J8) of system board. 2. SCSI backplane. 3. System board. Failure reading I2C device. Check device on bus 4. v System board Undetermined problems Use the information in this section if the diagnostic tests did not identify the failure, the devices list is incorrect, or the system is inoperative. Notes: 1. Damaged data in CMOS can cause undetermined problems. 2. Damaged data in BIOS code can cause undetermined problems. Check the LEDs on all the power supplies. If the LEDs indicate the power supplies are working correctly, complete the following steps: 1. Turn off the server. 2. Be sure the server is cabled correctly. 3. Remove or disconnect the following devices (one at a time) until you find the failure (turn on the server and reconfigure each time): v Any external devices v Surge suppressor device (on the server) v Modem, printer, mouse, or non-IBM devices v Each adapter v Drives v Memory modules (minimum requirement = two 256 MB DIMMs) Note: Minimum operating requirements are: a. Power supply b. System board c. One microprocessor and VRM d. Memory (with a minimum of two 256 MB DIMMs) 4. Turn on the server. If the problem remains, suspect the following FRUs in the order listed: Chapter 6. Symptom-to-FRU index 109

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Bus
fault
messages
Note:
See
“System”
on
page
112
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Bus
fault
messages
Message
Action
Failure
reading
12C
device.
Check
devices
on
bus
0.
1.
If
installed,
reseat
the
I2C
cable
between
Remote
Supervisor
Adapter
(in
PCI
slot
1/J1)
and
system
board
(J2).
2.
Memory
DIMMs.
3.
System
board.
Failure
reading
12C
device.
Check
devices
on
bus
1.
1.
Reseat
the
I2C
cable
between
the
operator
information
panel
and
system
board
(J10).
2.
Operator
information
card.
3.
System
board.
Failure
reading
12C
device.
Check
devices
on
bus
2.
1.
Reseat
the
cable
between
system
board
and
the
power
supply.
2.
Power
supply.
3.
System
board.
Failure
reading
12C
device.
Check
devices
on
bus
3.
1.
Reseat
the
cable
between
the
SCSI
backplane
and
connector
(J8)
of
system
board.
2.
SCSI
backplane.
3.
System
board.
Failure
reading
I2C
device.
Check
device
on
bus
4.
v
System
board
Undetermined
problems
Use
the
information
in
this
section
if
the
diagnostic
tests
did
not
identify
the
failure,
the
devices
list
is
incorrect,
or
the
system
is
inoperative.
Notes:
1.
Damaged
data
in
CMOS
can
cause
undetermined
problems.
2.
Damaged
data
in
BIOS
code
can
cause
undetermined
problems.
Check
the
LEDs
on
all
the
power
supplies.
If
the
LEDs
indicate
the
power
supplies
are
working
correctly,
complete
the
following
steps:
1.
Turn
off
the
server.
2.
Be
sure
the
server
is
cabled
correctly.
3.
Remove
or
disconnect
the
following
devices
(one
at
a
time)
until
you
find
the
failure
(turn
on
the
server
and
reconfigure
each
time):
v
Any
external
devices
v
Surge
suppressor
device
(on
the
server)
v
Modem,
printer,
mouse,
or
non-IBM
devices
v
Each
adapter
v
Drives
v
Memory
modules
(minimum
requirement
=
two
256
MB
DIMMs)
Note:
Minimum
operating
requirements
are:
a.
Power
supply
b.
System
board
c.
One
microprocessor
and
VRM
d.
Memory
(with
a
minimum
of
two
256
MB
DIMMs)
4.
Turn
on
the
server.
If
the
problem
remains,
suspect
the
following
FRUs
in
the
order
listed:
Chapter
6.
Symptom-to-FRU
index
109