Server power features, Turning on the server, Server – Lenovo RD210 User Manual
Page 51: Power, Features, Turning
Table
5.
System
pulse
LEDs
(continued)
LED
Description
Action
IMM
heartbeat
IMM
heartbeat
boot
process.
The
following
steps
describe
the
different
stages
of
the
IMM
heartbeat
sequencing
process.
1.
When
this
LED
is
blinking
fast
(approximately
4Hz),
this
indicates,
that
the
IMM
code
is
in
the
loading
process.
2.
When
this
LED
goes
off
momentarily,
this
indicates
that
the
IMM
code
has
loaded
completely.
3.
When
this
LED
goes
off
momentarily
and
then
starts
blinking
slowing
(approximately
1Hz),
this
indicates
that
IMM
is
fully
operational.
You
can
now
press
the
power-control
button
to
power-on
the
server.
4.
If
this
LED
does
not
blink
within
30
seconds
of
connecting
a
power
source
to
the
server,
complete
the
following
steps:
a.
(Trained
service
technician
only)
use
the
IMM
recovery
jumper
to
recover
the
firmware
(see
b.
(Trained
service
technician
only)
replace
the
system
board.
Server
power
features
When
the
server
is
connected
to
an
ac
power
source
but
is
not
turned
on,
the
operating
system
does
not
run,
and
all
core
logic
except
for
the
service
processor
(the
Integrated
Management
Module)
is
shut
down;
however,
the
server
can
respond
to
requests
to
the
service
processor,
such
as
a
remote
request
to
turn
on
the
server.
The
power-on
LED
flashes
to
indicate
that
the
server
is
connected
to
ac
power
but
is
not
turned
on.
Turning
on
the
server
Approximately
5
seconds
after
the
server
is
connected
to
ac
power,
one
or
more
fans
might
start
running
to
provide
cooling
while
the
server
is
connected
to
power
and
the
power-on
button
LED
will
blink
quickly.
Approximately
1
to
3
minutes
after
the
server
is
connected
to
ac
power,
the
power-control
button
becomes
active
(the
power-on
LED
will
blink
slowly),
and
one
or
more
fans
might
start
running
to
provide
cooling
while
the
server
is
connected
to
power.
You
can
turn
on
the
server
by
pressing
the
power-control
button.
The
server
can
also
be
turned
on
in
any
of
the
following
ways:
v
If
a
power
failure
occurs
while
the
server
is
turned
on,
the
server
will
restart
automatically
when
power
is
restored.
Chapter
4.
Server
controls,
LEDs,
and
power
35