IBM 8840 Hardware Maintenance Manual - Page 26

Identifying, problems, using, status, Power-on, password, override

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d. If you run the diagnostic programs with either no mouse or a USB mouse attached to your server, you will not be able to navigate between test categories using the Next Cat and Prev Cat buttons. All other functions provided by mouse-selectable buttons are also available using the function keys. e. You can test the USB keyboard by using the regular keyboard test. The regular mouse test can test a USB mouse. Also, you can run the USB interface test only if there are no USB devices attached. f. You can view server configuration information (such as system configuration, memory contents, interrupt request (IRQ) use, direct memory access (DMA) use, device drivers, and so on) by selecting Hardware Info from the top of the screen. If the diagnostic programs do not detect any hardware errors but the problem persists during normal server operations, a software error might be the cause. If you suspect a software problem, see the information that comes with the software package. Viewing the test log When the tests are completed, you can view the test log by selecting Utility from the top of the screen and then selecting View Test Log. You can save the test log to a file on a diskette or to the hard disk. The test-log data is maintained only while the diagnostic programs are active. When you exit from the diagnostic programs, the test log is cleared (saved test logs are not affected). To save the test log to a file on a diskette or to the hard disk so that you can view it later, click Save Log on the diagnostic programs screen and specify a location and name for the saved log file. Note: To save the test log to a diskette, you must use a diskette that you have formatted yourself; this function does not work with preformatted diskettes. If the diskette has sufficient space for the test log, the diskette may contain other data. Viewing the system-error log or BMC log You can also view the system-error log and BMC log from the diagnostic programs. See the instructions in "Viewing error logs from diagnostic programs" on page 13. Identifying problems using status LEDs If the system-error LED on the front of the server is on, one or more LEDs inside the server or on the power supply will be on. Your server has LEDs to help you identify problems with some server components. These LEDs are part of the light path diagnostics feature built into the server. By following the path of lights, you can quickly identify the type of system error that occurred. Your server is designed so that any LEDs that are lit remain lit when the server shuts down as long as the ac power source is good and the power supply can supply +5 V dc current to the server. This feature helps you isolate the problem if an error causes the server to shut down. See "Diagnosing problems using light path diagnostics" on page 18. Power-on password override Power-on password override. Changing the position of this switch bypasses the power-on password check the next time the server is turned on and starts the 16 xSeries 346 Types 8840 and 1880: Hardware Maintenance Manual and Troubleshooting Guide

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d.
If
you
run
the
diagnostic
programs
with
either
no
mouse
or
a
USB
mouse
attached
to
your
server,
you
will
not
be
able
to
navigate
between
test
categories
using
the
Next
Cat
and
Prev
Cat
buttons.
All
other
functions
provided
by
mouse-selectable
buttons
are
also
available
using
the
function
keys.
e.
You
can
test
the
USB
keyboard
by
using
the
regular
keyboard
test.
The
regular
mouse
test
can
test
a
USB
mouse.
Also,
you
can
run
the
USB
interface
test
only
if
there
are
no
USB
devices
attached.
f.
You
can
view
server
configuration
information
(such
as
system
configuration,
memory
contents,
interrupt
request
(IRQ)
use,
direct
memory
access
(DMA)
use,
device
drivers,
and
so
on)
by
selecting
Hardware
Info
from
the
top
of
the
screen.
If
the
diagnostic
programs
do
not
detect
any
hardware
errors
but
the
problem
persists
during
normal
server
operations,
a
software
error
might
be
the
cause.
If
you
suspect
a
software
problem,
see
the
information
that
comes
with
the
software
package.
Viewing
the
test
log
When
the
tests
are
completed,
you
can
view
the
test
log
by
selecting
Utility
from
the
top
of
the
screen
and
then
selecting
View
Test
Log
.
You
can
save
the
test
log
to
a
file
on
a
diskette
or
to
the
hard
disk.
The
test-log
data
is
maintained
only
while
the
diagnostic
programs
are
active.
When
you
exit
from
the
diagnostic
programs,
the
test
log
is
cleared
(saved
test
logs
are
not
affected).
To
save
the
test
log
to
a
file
on
a
diskette
or
to
the
hard
disk
so
that
you
can
view
it
later,
click
Save
Log
on
the
diagnostic
programs
screen
and
specify
a
location
and
name
for
the
saved
log
file.
Note:
To
save
the
test
log
to
a
diskette,
you
must
use
a
diskette
that
you
have
formatted
yourself;
this
function
does
not
work
with
preformatted
diskettes.
If
the
diskette
has
sufficient
space
for
the
test
log,
the
diskette
may
contain
other
data.
Viewing
the
system-error
log
or
BMC
log
You
can
also
view
the
system-error
log
and
BMC
log
from
the
diagnostic
programs.
See
the
instructions
in
“Viewing
error
logs
from
diagnostic
programs”
on
page
13.
Identifying
problems
using
status
LEDs
If
the
system-error
LED
on
the
front
of
the
server
is
on,
one
or
more
LEDs
inside
the
server
or
on
the
power
supply
will
be
on.
Your
server
has
LEDs
to
help
you
identify
problems
with
some
server
components.
These
LEDs
are
part
of
the
light
path
diagnostics
feature
built
into
the
server.
By
following
the
path
of
lights,
you
can
quickly
identify
the
type
of
system
error
that
occurred.
Your
server
is
designed
so
that
any
LEDs
that
are
lit
remain
lit
when
the
server
shuts
down
as
long
as
the
ac
power
source
is
good
and
the
power
supply
can
supply
+5
V
dc
current
to
the
server.
This
feature
helps
you
isolate
the
problem
if
an
error
causes
the
server
to
shut
down.
See
“Diagnosing
problems
using
light
path
diagnostics”
on
page
18.
Power-on
password
override
Power-on
password
override.
Changing
the
position
of
this
switch
bypasses
the
power-on
password
check
the
next
time
the
server
is
turned
on
and
starts
the
16
xSeries
346
Types
8840
and
1880:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide