Chapter
2.
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
for
more
information.
Diagnostic
tools
The
following
tools
are
available
to
help
you
diagnose
and
solve
hardware-related
problems:
v
POST
beep
codes,
error
messages,
and
error
logs
The
power-on
self-test
(POST)
generates
beep
codes
and
messages
to
indicate
successful
test
completion
or
the
detection
of
a
problem.
See
for
more
information.
v
Problem
isolation
tables
Use
these
tables
to
help
you
diagnose
various
symptoms.
See
v
Light
path
diagnostics
Use
the
light
path
diagnostics
to
diagnose
system
errors
quickly.
See
for
more
information.
v
Diagnostic
programs
and
error
messages
The
diagnostic
programs
are
stored
in
memory
on
the
microprocessor
tray.
These
programs
are
the
primary
method
of
testing
the
major
components
of
the
server.
See
for
more
information.
POST
When
you
turn
on
the
server,
it
performs
a
series
of
tests
to
check
the
operation
of
server
components
and
some
of
the
options
in
the
server.
This
series
of
tests
is
called
the
power-on
self-test,
or
POST.
If
POST
finishes
without
detecting
any
problems,
a
single
beep
sounds,
and
the
first
screen
of
the
operating
system
opens,
or
an
application
program
starts.
If
POST
detects
a
problem,
more
than
one
beep
might
sound,
or
an
error
message
appears
on
the
screen.
See
and
for
more
information.
Notes:
1.
If
a
power-on
password
is
set,
you
must
type
the
password
and
press
Enter,
when
prompted,
before
POST
will
continue.
2.
A
single
problem
might
cause
several
error
messages.
When
this
occurs,
correct
the
cause
of
the
first
error
message.
The
other
error
messages
usually
will
not
occur
the
next
time
you
run
the
test.
©
Copyright
IBM
Corp.
2005
13
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