Powering
the
System
On
and
Off
For
procedures
to
power
off
and
power
on
the
system
for
various
system
configurations
and
operating
systems,
see
“Stopping
the
System”
on
page
282
and
“Starting
the
System”
on
page
283.
Console
Note:
This
section
applies
to
a
system
without
an
HMC
attached.
The
firmware
starts
a
console-selection
sequence
at
system
boot
time
if
any
of
the
following
is
true:
v
A
console
has
not
yet
been
selected.
v
A
previous
console-selection
sequence
timed
out.
v
A
change
in
the
system
configuration
affects
the
console
(keyboard
installed
or
removed,
mouse
installed
or
removed,
graphics
adapter
installed
or
removed
or
moved
to
another
PCI
slot).
The
console-selection
sequence
allows
you
to
select
(from
the
appropriate
input
device)
any
one
of
the
available
console
devices.
If
no
console
is
selected
within
approximately
60
seconds,
serial
port
1
(S1)
is
selected
as
the
console
and
the
selection
sequence
times
out.
Attention:
If
an
ASCII
terminal
is
attached
to
serial
port
1
(S1),
and
there
is
any
interaction
with
this
terminal:
v
After
OK
displays
in
the
operator
panel
AND
v
Before
the
power-on
sequence
is
initiated
the
firmware
will
use
this
terminal
as
the
console,
regardless
of
the
previous
console
selection.
After
a
console
has
been
selected,
the
console-selection
sequence
is
only
started
at
boot
time
if
there
is
a
change
in
the
system
configuration
(as
previously
described),
or
the
contents
of
the
system’s
nonvolatile
memory
(NVRAM)
are
lost.
Note:
Moving
an
ASCII
terminal
from
one
serial
port
to
another
(from
S1
to
S2)
cannot
be
detected
by
the
firmware,
so
it
does
not
constitute
a
configuration
change.
You
can
also
initiate
a
system
console-selection
sequence
from
the
SMS
menus.
Power-On
Self-Test
After
power
is
turned
on
and
before
the
operating
system
is
loaded,
the
system
does
a
power-on
self-test
(POST).
This
test
performs
checks
to
ensure
that
the
hardware
is
functioning
correctly
before
the
operating
system
is
loaded.
During
the
POST,
a
POST
screen
displays,
and
POST
indicators
appear
on
the
firmware
console
(if
one
is
connected).
The
next
section
describes
the
POST
indicators
and
functions
that
can
be
accessed
during
the
POST.
Chapter
1.
Reference
Information
7
Summary of Contents for P 615 series
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