IBM 72335LU User Guide - Page 23

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v Power-control button cover: Slide this cover over the power-control button to prevent the server from being turned off accidentally. v Power-control button: Press this button to turn the server on and off manually. v Power-on LED: When this LED is lit and not flashing, it indicates that the server is turned on. When this LED is flashing, it indicates that the server is turned off and still connected to an ac power source. When this LED is off, it indicates that ac power is not present or the power supply or the LED itself has failed. Note: If this LED is off, it does not mean that there is no electrical power in the server. The LED might be burned out. To remove all electrical power from the server, you must disconnect the power cords from the electrical outlets. v Ethernet-icon LED: This LED lights the Ethernet icon. v Ethernet activity LEDs: When these LEDs flash, they indicate that there is activity between the server and the network on the indicated port. v Locator LED: Use this LED to visually locate the server among other servers. You can use IBM Director to light this LED remotely or press the locator button to light the LED manually. This LED is also lit during startup. In multi-node configurations, when this LED flashes, it indicates that the server is the primary node. When this LED is lit continuously, it indicates that the server is a secondary node. v Locator button: Press this button to turn the locator LED on and off manually. In multi-node configurations, press this button to turn the locator LED on and off in all nodes in the configuration. v Information LED: When this LED is lit, it indicates that there is a suboptimal condition in the server and that light path diagnostics will light an additional LED to help isolate the condition. This LED and LEDs on the light path diagnostics panel remain lit until you resolve the condition or you press the remind button. v System-error LED: When this LED is lit, it indicates that a system error has occurred. An LED on the light path diagnostics panel is also lit to help isolate the error. Electrostatic-discharge connector: Connect an electrostatic-discharge wrist strap to this connector. Scalability LED: When this LED is lit, it indicates that an optional scalability key is installed in the server, which enables support for connecting the server to other servers to form multi-node configurations. Chapter 1. The System x3850 M2 and System x3950 M2 server 11

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v
Power-control
button
cover:
Slide
this
cover
over
the
power-control
button
to
prevent
the
server
from
being
turned
off
accidentally.
v
Power-control
button:
Press
this
button
to
turn
the
server
on
and
off
manually.
v
Power-on
LED:
When
this
LED
is
lit
and
not
flashing,
it
indicates
that
the
server
is
turned
on.
When
this
LED
is
flashing,
it
indicates
that
the
server
is
turned
off
and
still
connected
to
an
ac
power
source.
When
this
LED
is
off,
it
indicates
that
ac
power
is
not
present
or
the
power
supply
or
the
LED
itself
has
failed.
Note:
If
this
LED
is
off,
it
does
not
mean
that
there
is
no
electrical
power
in
the
server.
The
LED
might
be
burned
out.
To
remove
all
electrical
power
from
the
server,
you
must
disconnect
the
power
cords
from
the
electrical
outlets.
v
Ethernet-icon
LED:
This
LED
lights
the
Ethernet
icon.
v
Ethernet
activity
LEDs:
When
these
LEDs
flash,
they
indicate
that
there
is
activity
between
the
server
and
the
network
on
the
indicated
port.
v
Locator
LED:
Use
this
LED
to
visually
locate
the
server
among
other
servers.
You
can
use
IBM
Director
to
light
this
LED
remotely
or
press
the
locator
button
to
light
the
LED
manually.
This
LED
is
also
lit
during
startup.
In
multi-node
configurations,
when
this
LED
flashes,
it
indicates
that
the
server
is
the
primary
node.
When
this
LED
is
lit
continuously,
it
indicates
that
the
server
is
a
secondary
node.
v
Locator
button:
Press
this
button
to
turn
the
locator
LED
on
and
off
manually.
In
multi-node
configurations,
press
this
button
to
turn
the
locator
LED
on
and
off
in
all
nodes
in
the
configuration.
v
Information
LED:
When
this
LED
is
lit,
it
indicates
that
there
is
a
suboptimal
condition
in
the
server
and
that
light
path
diagnostics
will
light
an
additional
LED
to
help
isolate
the
condition.
This
LED
and
LEDs
on
the
light
path
diagnostics
panel
remain
lit
until
you
resolve
the
condition
or
you
press
the
remind
button.
v
System-error
LED:
When
this
LED
is
lit,
it
indicates
that
a
system
error
has
occurred.
An
LED
on
the
light
path
diagnostics
panel
is
also
lit
to
help
isolate
the
error.
Electrostatic-discharge
connector:
Connect
an
electrostatic-discharge
wrist
strap
to
this
connector.
Scalability
LED:
When
this
LED
is
lit,
it
indicates
that
an
optional
scalability
key
is
installed
in
the
server,
which
enables
support
for
connecting
the
server
to
other
servers
to
form
multi-node
configurations.
Chapter
1.
The
System
x3850
M2
and
System
x3950
M2
server
11