IBM 8835 Hardware Maintenance Manual - Page 23

Diagnostics

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Chapter 3. Diagnostics This chapter provides basic troubleshooting information to help you solve some common problems that might occur with the server. If you cannot locate and correct the problem using the information in this chapter, see Appendix A, "Getting help and technical assistance," on page 99 for more information. General checkout The diagnostic programs are on the IBM Enhanced Diagnostics CD. These programs are the primary method of testing the major components of the server: the system board, Ethernet controller, video controller, RAM, keyboard, mouse (pointing device), serial ports, hard disk drives, and parallel port. You can also use them to test some external devices. See "Diagnostic programs and error messages" on page 16.. Also, if you cannot determine whether a problem is caused by the hardware or by the software, you can run the diagnostic programs to confirm that the hardware is working correctly. When you run the diagnostic programs, a single problem might cause several error messages. When this occurs, work to correct the cause of the first error message. After the cause of the first error message is corrected, the other error messages might not occur the next time you run the test. A failed server might be part of a shared hard disk drive cluster (two or more servers sharing the same external storage devices). Before running the diagnostic programs, make sure that the failing server is not part of a shared hard disk drive cluster. A server might be part of a cluster if one or more of the following is true: v The customer identifies the server as part of a cluster. v One or more external storage units are attached to the server and at least one of the attached storage units is additionally attached to another server or unidentifiable source. v One or more servers are located near the failing server. If the failing server is suspected to be part of a shared hard disk drive cluster, all diagnostic tests can be run except diagnostic tests that test the storage unit (a hard disk drive in the storage unit) or the storage adapter that is attached to the storage unit. Notes: 1. For servers that are part of a shared hard disk drive cluster, run one test at a time in looped mode. Do not run all tests in looped mode, because this could enable the hard disk drive diagnostic tests. 2. If multiple error codes are displayed, diagnose the first error code that is displayed. 3. If the server is suspended with a POST error, go to "POST error codes" on page 84. © Copyright IBM Corp. 2002, 2003 13

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Chapter
3.
Diagnostics
This
chapter
provides
basic
troubleshooting
information
to
help
you
solve
some
common
problems
that
might
occur
with
the
server.
If
you
cannot
locate
and
correct
the
problem
using
the
information
in
this
chapter,
see
Appendix
A,
“Getting
help
and
technical
assistance,”
on
page
99
for
more
information.
General
checkout
The
diagnostic
programs
are
on
the
IBM
Enhanced
Diagnostics
CD.
These
programs
are
the
primary
method
of
testing
the
major
components
of
the
server:
the
system
board,
Ethernet
controller,
video
controller,
RAM,
keyboard,
mouse
(pointing
device),
serial
ports,
hard
disk
drives,
and
parallel
port.
You
can
also
use
them
to
test
some
external
devices.
See
“Diagnostic
programs
and
error
messages”
on
page
16..
Also,
if
you
cannot
determine
whether
a
problem
is
caused
by
the
hardware
or
by
the
software,
you
can
run
the
diagnostic
programs
to
confirm
that
the
hardware
is
working
correctly.
When
you
run
the
diagnostic
programs,
a
single
problem
might
cause
several
error
messages.
When
this
occurs,
work
to
correct
the
cause
of
the
first
error
message.
After
the
cause
of
the
first
error
message
is
corrected,
the
other
error
messages
might
not
occur
the
next
time
you
run
the
test.
A
failed
server
might
be
part
of
a
shared
hard
disk
drive
cluster
(two
or
more
servers
sharing
the
same
external
storage
devices).
Before
running
the
diagnostic
programs,
make
sure
that
the
failing
server
is
not
part
of
a
shared
hard
disk
drive
cluster.
A
server
might
be
part
of
a
cluster
if
one
or
more
of
the
following
is
true:
v
The
customer
identifies
the
server
as
part
of
a
cluster.
v
One
or
more
external
storage
units
are
attached
to
the
server
and
at
least
one
of
the
attached
storage
units
is
additionally
attached
to
another
server
or
unidentifiable
source.
v
One
or
more
servers
are
located
near
the
failing
server.
If
the
failing
server
is
suspected
to
be
part
of
a
shared
hard
disk
drive
cluster,
all
diagnostic
tests
can
be
run
except
diagnostic
tests
that
test
the
storage
unit
(a
hard
disk
drive
in
the
storage
unit)
or
the
storage
adapter
that
is
attached
to
the
storage
unit.
Notes:
1.
For
servers
that
are
part
of
a
shared
hard
disk
drive
cluster,
run
one
test
at
a
time
in
looped
mode.
Do
not
run
all
tests
in
looped
mode,
because
this
could
enable
the
hard
disk
drive
diagnostic
tests.
2.
If
multiple
error
codes
are
displayed,
diagnose
the
first
error
code
that
is
displayed.
3.
If
the
server
is
suspended
with
a
POST
error,
go
to
“POST
error
codes”
on
page
84.
©
Copyright
IBM
Corp.
2002,
2003
13