v
Diagnostic
programs
The
system
diagnostic
programs
are
on
a
hidden
partition
on
the
hard
disk.
These
programs
are
the
primary
methods
of
testing
the
major
components
of
your
computer.
See
“Diagnostic
programs
and
error
messages”
on
page
16
for
more
information.
v
Symptom-to-FRU
index
This
index
problem
symptoms
and
steps
to
correct
each
problem.
See
the
Chapter
6,
“Symptom-to-FRU
index,”
on
page
83
for
more
information.
v
System-board
error
LEDs
An
LED
on
the
system
board
might
also
be
lit
to
help
isolate
an
error
indicated
by
the
system
error
LED
on
the
front
of
the
computer.
See
“System
board
error
LEDs”
on
page
74
for
more
information.
Power-on
self-test
(POST)
When
you
turn
on
the
computer,
the
power-on
self-test
(POST)
performs
a
series
of
tests
to
check
the
operation
of
system
components
and
some
of
the
installed
options.
If
POST
finishes
without
detecting
any
problems,
the
first
window
of
your
operating
system
or
application
program
opens.
If
POST
detects
a
problem,
more
than
one
beep
sounds
and
an
error
message
appears
on
the
screen.
Notes:
1.
If
you
have
set
a
user
password,
you
must
type
the
password
and
press
Enter,
when
prompted,
before
the
operating
system
will
start.
2.
A
single
problem
might
cause
several
error
messages.
When
this
occurs,
work
to
correct
the
cause
of
the
first
error
message.
After
you
correct
the
cause
of
the
first
error
message,
the
other
error
messages
usually
will
be
resolved
the
next
time
you
run
the
test.
POST
beep
codes
Use
the
following
beep
code
descriptions
to
help
diagnose
and
solve
problems
that
are
detected
during
startup:
No
beeps
If
no
beep
occurs
after
the
computer
completes
POST,
see
Chapter
6,
“Symptom-to-FRU
index,”
on
page
83.
Continuous
beep
The
startup
(boot)
microprocessor
has
failed,
or
the
system
board
or
speaker
subsystem
might
contain
a
failing
component.
If
the
computer
continues
through
POST
with
no
errors,
got
to
“General
checkout”
on
page
13
and
run
the
diagnostic
programs.
If
no
video
appears,
the
startup
processor
has
failed.
Beep
codes
for
specific
failures
Beep
codes
indicating
specific
system
problems.
For
a
list
of
beep
codes,
see
“Beep
symptoms”
on
page
83.
Chapter
3.
Diagnostics
15
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