IBM 8840 Hardware Maintenance Manual - Page 114

Problem, determination

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Note: Damaged data in CMOS or damaged BIOS code can cause undetermined problems. If you suspect that the BIOS code is damaged, see "Recovering the BIOS code" on page 18. Note: 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 = 512 MB (2 banks of 256 MB DIMMs)) Note: Minimum operating requirements are: a. One power supply b. PCI riser card c. PCI-X riser card d. Power cage assembly e. System board f. One microprocessor and VRM g. Memory module (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: Power supply Power cage assembly System board Notes: 1. If the problem goes away when you remove an adapter from the system and replacing that adapter does not correct the problem, suspect the system board. 2. If you suspect a networking problem and all the system tests pass, suspect a network cabling problem external to the system. Problem determination tips Because of the variety of hardware and software combinations that can be encountered, use the following information to assist you in problem determination. If possible, have this information available when requesting assistance from Service Support and Engineering functions. v Machine type and model v Microprocessor or hard disk upgrades v Failure symptom - Do diagnostics fail? - What message appears in the diagnostics log? - What, when, where, single, or multiple systems? - Is the failure repeatable? - Has this configuration ever worked? - If it has been working, what changes were made prior to it failing? 104 xSeries 346 Types 8840 and 1880: Hardware Maintenance Manual and Troubleshooting Guide

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Note:
Damaged
data
in
CMOS
or
damaged
BIOS
code
can
cause
undetermined
problems.
If
you
suspect
that
the
BIOS
code
is
damaged,
see
“Recovering
the
BIOS
code”
on
page
18.
Note:
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
=
512
MB
(2
banks
of
256
MB
DIMMs))
Note:
Minimum
operating
requirements
are:
a.
One
power
supply
b.
PCI
riser
card
c.
PCI-X
riser
card
d.
Power
cage
assembly
e.
System
board
f.
One
microprocessor
and
VRM
g.
Memory
module
(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:
Power
supply
Power
cage
assembly
System
board
Notes:
1.
If
the
problem
goes
away
when
you
remove
an
adapter
from
the
system
and
replacing
that
adapter
does
not
correct
the
problem,
suspect
the
system
board.
2.
If
you
suspect
a
networking
problem
and
all
the
system
tests
pass,
suspect
a
network
cabling
problem
external
to
the
system.
Problem
determination
tips
Because
of
the
variety
of
hardware
and
software
combinations
that
can
be
encountered,
use
the
following
information
to
assist
you
in
problem
determination.
If
possible,
have
this
information
available
when
requesting
assistance
from
Service
Support
and
Engineering
functions.
v
Machine
type
and
model
v
Microprocessor
or
hard
disk
upgrades
v
Failure
symptom
–
Do
diagnostics
fail?
–
What
message
appears
in
the
diagnostics
log?
–
What,
when,
where,
single,
or
multiple
systems?
–
Is
the
failure
repeatable?
–
Has
this
configuration
ever
worked?
–
If
it
has
been
working,
what
changes
were
made
prior
to
it
failing?
104
xSeries
346
Types
8840
and
1880:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide