After
the
required
cables
are
installed,
and
the
power
cables
are
connected,
the
power
button
on
the
primary
I/O
drawer
operator
panel
can
be
pushed
to
initialize
the
system.
Progress
indicators,
also
referred
to
as
checkpoints
,
are
visible
on
the
primary
I/O
drawer
operator
panel
display
and
the
power
LED
on
the
primary
I/O
drawer
stops
blinking
and
stays
on,
indicating
the
system
power
is
on.
The
CEC
drawer
and
secondary
I/O
drawers
are
powered
on
through
the
primary
I/O
drawer
system
power
control
network
(SPCN).
When
power
is
applied,
the
power
LEDs
on
the
CEC
drawer
and
primary
I/O
drawer
go
from
blinking
to
on
continuously,
and
the
power
LED
on
the
secondary
I/O
drawer
comes
on
and
stays
on.
This
indicates
that
power
levels
are
satisfactory
in
the
drawers.
If
the
system
is
operating
under
AIX,
type
the
shutdown
command
to
power
off
the
system.
If
you
cannot
use
this
method,
you
can
power
off
the
system
by
pressing
the
primary
I/O
drawer
operator-panel
power
button.
Attention:
Using
the
operator-panel
power
pushbutton
to
power
off
the
system
can
cause
unpredictable
results
in
the
data
files,
and
the
next
IPL
will
take
longer
to
complete.
For
complete
details
on
how
to
power
on
and
off
the
system,
go
to
“Powering
Off
and
Powering
On
the
System”
on
page
427
and
“System
Power-On
Methods”
on
page
397.
Console
Strategy
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/removed,
mouse
installed/removed,
graphics
adapter
installed/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,
then:
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.
Chapter
1.
Reference
Information
5
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