IBM 8478 Hardware Maintenance Manual - Page 27

Viewing, Diagnostic, error, message, tables, Power, checkout

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Viewing the test log The test log records data about system failures and other pertinent information. The test log will not contain any information until after the diagnostic program has run. Note: If you already are running the diagnostic programs, begin with step 4 1. Insert the IBM Enhanced Diagnostics CD. 2. Turn on the system and watch the screen. If the system is on, shut down your operating system and restart the system. 3. If a power-on password is set, the system prompts you for it. Type in the appropriate password; then, press Enter. 4. Run the appropriate diagnostics program and when the Diagnostic Programs screen appears, select Utility. 5. Select View Test Log from the list that appears; then, follow the instructions on the screen. 6. You can save the test log to a file on a diskette or to your hard disk drive. Note: The system maintains the test-log data while the system is powered on. When you turn off the power to the server, the test log is cleared. Diagnostic error message tables For descriptions of the error messages that might appear when you run the diagnostic programs, see "Diagnostic error codes" on page 103. If diagnostic error messages appear that are not listed in those tables, make sure that the server has the latest levels of BIOS, Advanced System Management Processor, ServeRAID, and diagnostics microcode installed. Power checkout Power problems can be difficult to troubleshoot. For instance, a short circuit can exist anywhere on any of the power distribution busses. Usually a short circuit will cause the power subsystem to shut down because of an overcurrent condition. A general procedure for troubleshooting power problems is as follows: 1. Power off the server and disconnect the AC cord(s). 2. Check for loose cables in the power subsystem. Also check for short circuits, for instance if there is a loose screw causing a short circuit on a circuit board. Chapter 3. Diagnostics 17

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Viewing
the
test
log
The
test
log
records
data
about
system
failures
and
other
pertinent
information.
The
test
log
will
not
contain
any
information
until
after
the
diagnostic
program
has
run.
Note:
If
you
already
are
running
the
diagnostic
programs,
begin
with
step
4
1.
Insert
the
IBM
Enhanced
Diagnostics
CD.
2.
Turn
on
the
system
and
watch
the
screen.
If
the
system
is
on,
shut
down
your
operating
system
and
restart
the
system.
3.
If
a
power-on
password
is
set,
the
system
prompts
you
for
it.
Type
in
the
appropriate
password;
then,
press
Enter.
4.
Run
the
appropriate
diagnostics
program
and
when
the
Diagnostic
Programs
screen
appears,
select
Utility
.
5.
Select
View
Test
Log
from
the
list
that
appears;
then,
follow
the
instructions
on
the
screen.
6.
You
can
save
the
test
log
to
a
file
on
a
diskette
or
to
your
hard
disk
drive.
Note:
The
system
maintains
the
test-log
data
while
the
system
is
powered
on.
When
you
turn
off
the
power
to
the
server,
the
test
log
is
cleared.
Diagnostic
error
message
tables
For
descriptions
of
the
error
messages
that
might
appear
when
you
run
the
diagnostic
programs,
see
“Diagnostic
error
codes”
on
page
103.
If
diagnostic
error
messages
appear
that
are
not
listed
in
those
tables,
make
sure
that
the
server
has
the
latest
levels
of
BIOS,
Advanced
System
Management
Processor,
ServeRAID,
and
diagnostics
microcode
installed.
Power
checkout
Power
problems
can
be
difficult
to
troubleshoot.
For
instance,
a
short
circuit
can
exist
anywhere
on
any
of
the
power
distribution
busses.
Usually
a
short
circuit
will
cause
the
power
subsystem
to
shut
down
because
of
an
overcurrent
condition.
A
general
procedure
for
troubleshooting
power
problems
is
as
follows:
1.
Power
off
the
server
and
disconnect
the
AC
cord(s).
2.
Check
for
loose
cables
in
the
power
subsystem.
Also
check
for
short
circuits,
for
instance
if
there
is
a
loose
screw
causing
a
short
circuit
on
a
circuit
board.
Chapter
3.
Diagnostics
17