IBM 622020U Maintenance Manual - Page 126

Problem, determination

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1. Turn off the computer. 2. Make sure that the computer is cabled correctly. 3. Remove or disconnect the following devices (one at a time) until you find the failure (turn on the computer and reconfigure each time): v Any external devices v Surge-suppressor device (on the computer) v Modem, printer, mouse, or non-IBM devices v Each adapter v Drives v Memory modules (minimum requirement = 256 MB (two banks of 128 MB DIMMs)) The following minimum configuration is required for the computer to operate: a. One power supply b. System board c. One microprocessor and VRM d. Memory module (with a minimum of two 128 MB DIMMs) 4. Turn on the computer. If the problem remains, suspect the following FRUs in the following order: v Power supply v System board Notes: 1. If the problem is corrected 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 the computer passes all the system tests, suspect a network cabling problem external to the computer. Problem determination tips Because of the variety of hardware and software combinations that can you can encounter, 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 drive upgrades v Failure symptom - Do diagnostics fail? - What, when, where? Single or multiple computers? - Is the failure repeatable? - Has this configuration ever worked? - If it has been working, what changes were made before it failed? - Is this the original reported failure? v Diagnostics version (type and version level) v Hardware configuration - Print (print screen) configuration currently in use - BIOS code level v Operating system software (type and version level) Note: To eliminate confusion, computers are considered to be identical only if they: v Are exactly the same machine type and models v Have the same BIOS code level 116 IBM IntelliStation M Pro Types 6220 and 6230: Hardware Maintenance Manual

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1.
Turn
off
the
computer.
2.
Make
sure
that
the
computer
is
cabled
correctly.
3.
Remove
or
disconnect
the
following
devices
(one
at
a
time)
until
you
find
the
failure
(turn
on
the
computer
and
reconfigure
each
time):
v
Any
external
devices
v
Surge-suppressor
device
(on
the
computer)
v
Modem,
printer,
mouse,
or
non-IBM
devices
v
Each
adapter
v
Drives
v
Memory
modules
(minimum
requirement
=
256
MB
(two
banks
of
128
MB
DIMMs))
The
following
minimum
configuration
is
required
for
the
computer
to
operate:
a.
One
power
supply
b.
System
board
c.
One
microprocessor
and
VRM
d.
Memory
module
(with
a
minimum
of
two
128
MB
DIMMs)
4.
Turn
on
the
computer.
If
the
problem
remains,
suspect
the
following
FRUs
in
the
following
order:
v
Power
supply
v
System
board
Notes:
1.
If
the
problem
is
corrected
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
the
computer
passes
all
the
system
tests,
suspect
a
network
cabling
problem
external
to
the
computer.
Problem
determination
tips
Because
of
the
variety
of
hardware
and
software
combinations
that
can
you
can
encounter,
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
drive
upgrades
v
Failure
symptom
–
Do
diagnostics
fail?
–
What,
when,
where?
Single
or
multiple
computers?
–
Is
the
failure
repeatable?
–
Has
this
configuration
ever
worked?
–
If
it
has
been
working,
what
changes
were
made
before
it
failed?
–
Is
this
the
original
reported
failure?
v
Diagnostics
version
(type
and
version
level)
v
Hardware
configuration
–
Print
(print
screen)
configuration
currently
in
use
–
BIOS
code
level
v
Operating
system
software
(type
and
version
level)
Note:
To
eliminate
confusion,
computers
are
considered
to
be
identical
only
if
they:
v
Are
exactly
the
same
machine
type
and
models
v
Have
the
same
BIOS
code
level
116
IBM
IntelliStation
M
Pro
Types
6220
and
6230:
Hardware
Maintenance
Manual