IBM 8649 Hardware Maintenance Manual - Page 128

Undetermined, problems

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Page 128 highlights

Note: See "System replaceable units" on page 122 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 1. 1. Reseat the I2C cable between the operator information panel and system board (J22). 2. Operator information panel. 3. System board. Failure reading 12C device. Check devices on bus 2. 1. Reseat the cable between system board and the power supply (power cage assembly, if installed) (J10). 2. Power cage assembly, if installed. 3. Power supply. 4. System board. Failure reading 12C device. Check devices on bus 3. 1. Reseat the cable between the DASD backplane and connector (J10) of system board. 2. DASD backplane. 3. System board. Failure reading I2C device. Check device on bus 4. 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): Any external devices Surge suppressor device (on the server) Modem, printer, mouse, or non-IBM devices Each adapter Drives Memory modules (minimum requirement = 256 MB (2 banks of 128 MB DIMMs)) Note: Minimum operating requirements are: a. One power supply b. Power cage assembly, if installed. c. System board d. One microprocessor and VRM e. Memory module (with a minimum of two 128 MB DIMMs) 4. Turn on the server. If the problem remains, suspect the following FRUs in the order listed: Power supply Power cage assembly, if installed 118 IBM xSeries 225 Types 8649: Hardware Maintenance Manual and Troubleshooting Guide

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Note:
See
“System
replaceable
units”
on
page
122
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
1.
1.
Reseat
the
I2C
cable
between
the
operator
information
panel
and
system
board
(J22).
2.
Operator
information
panel.
3.
System
board.
Failure
reading
12C
device.
Check
devices
on
bus
2.
1.
Reseat
the
cable
between
system
board
and
the
power
supply
(power
cage
assembly,
if
installed)
(J10).
2.
Power
cage
assembly,
if
installed.
3.
Power
supply.
4.
System
board.
Failure
reading
12C
device.
Check
devices
on
bus
3.
1.
Reseat
the
cable
between
the
DASD
backplane
and
connector
(J10)
of
system
board.
2.
DASD
backplane.
3.
System
board.
Failure
reading
I2C
device.
Check
device
on
bus
4.
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):
Any
external
devices
Surge
suppressor
device
(on
the
server)
Modem,
printer,
mouse,
or
non-IBM
devices
Each
adapter
Drives
Memory
modules
(minimum
requirement
=
256
MB
(2
banks
of
128
MB
DIMMs))
Note:
Minimum
operating
requirements
are:
a.
One
power
supply
b.
Power
cage
assembly,
if
installed.
c.
System
board
d.
One
microprocessor
and
VRM
e.
Memory
module
(with
a
minimum
of
two
128
MB
DIMMs)
4.
Turn
on
the
server.
If
the
problem
remains,
suspect
the
following
FRUs
in
the
order
listed:
Power
supply
Power
cage
assembly,
if
installed
118
IBM
xSeries
225
Types
8649:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide