IBM 8862 Hardware Maintenance Manual - Page 146

Undetermined, problems

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Undetermined problems Use the information in this section if the diagnostic tests did not diagnose the failure or if the server is inoperative. Notes: 1. If you suspect a software mismatch is causing failures (solid or intermittent), be sure to see "Error symptoms" on page 121. 2. Damaged data in CMOS memory can cause undetermined problems. 3. Damaged data in BIOS code can cause undetermined problems. See "Recovering BIOS code" on page 24. Check the LEDs on all the power supplies (see "Power LED errors" on page 130). If the LEDs indicate the power supplies are working correctly, complete the following steps: 1. Turn off the server. 2. Make sure that 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 it 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 Hard disk drives v Memory modules (minimum requirement = 1 GB (2 x 512 MB DIMMs)) v Service processor Note: Minimum operating requirements are: v 1 microprocessor v 2 x 512 MB DIMMs in memory board v 1 power supply v Power backplane v I/O board 4. Turn on the server. If the problem remains, suspect the following FRUs in the following order: a. Microprocessor-tray assembly b. I/O board c. Memory board d. Power backplane Notes: 1. If the problem is solved when you remove an adapter from the server and replacing that adapter does not correct the problem, suspect the I/O board. 2. If you suspect a networking problem and the server passes all the system tests, suspect a network cabling problem external to the server. 136 IBM xSeries 365 Types 8861, 8862: Hardware Maintenance Manual and Troubleshooting Guide

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Undetermined
problems
Use
the
information
in
this
section
if
the
diagnostic
tests
did
not
diagnose
the
failure
or
if
the
server
is
inoperative.
Notes:
1.
If
you
suspect
a
software
mismatch
is
causing
failures
(solid
or
intermittent),
be
sure
to
see
“Error
symptoms”
on
page
121.
2.
Damaged
data
in
CMOS
memory
can
cause
undetermined
problems.
3.
Damaged
data
in
BIOS
code
can
cause
undetermined
problems.
See
“Recovering
BIOS
code”
on
page
24.
Check
the
LEDs
on
all
the
power
supplies
(see
“Power
LED
errors”
on
page
130).
If
the
LEDs
indicate
the
power
supplies
are
working
correctly,
complete
the
following
steps:
1.
Turn
off
the
server.
2.
Make
sure
that
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
it
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
Hard
disk
drives
v
Memory
modules
(minimum
requirement
=
1
GB
(2
x
512
MB
DIMMs))
v
Service
processor
Note:
Minimum
operating
requirements
are:
v
1
microprocessor
v
2
x
512
MB
DIMMs
in
memory
board
v
1
power
supply
v
Power
backplane
v
I/O
board
4.
Turn
on
the
server.
If
the
problem
remains,
suspect
the
following
FRUs
in
the
following
order:
a.
Microprocessor-tray
assembly
b.
I/O
board
c.
Memory
board
d.
Power
backplane
Notes:
1.
If
the
problem
is
solved
when
you
remove
an
adapter
from
the
server
and
replacing
that
adapter
does
not
correct
the
problem,
suspect
the
I/O
board.
2.
If
you
suspect
a
networking
problem
and
the
server
passes
all
the
system
tests,
suspect
a
network
cabling
problem
external
to
the
server.
136
IBM
xSeries
365
Types
8861,
8862:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide