IBM x3550 Installation Guide - Page 44

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- Power-on LED: When this green 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 is 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. A power LED is also on the rear of the server. 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 cord from the electrical outlet. - System locator LED: Use this blue LED to visually locate the server if it is in a location with other servers. You can use IBM Director to light this LED remotely. This LED is controlled by the BMC. - System-error LED: When this amber LED is lit, it indicates that a system error has occurred. A system-error LED is also on the rear of the server. An LED on the light path diagnostics panel on the system board is also lit to help isolate the error. This LED is controlled by the BMC. - Release Latch: Press the release latch to the left to slide out the operator information panel and view the light path diagnostics panel. See the Problem Determination and Service Guide for more information about the light path diagnostics panel. - System information LED: When this amber LED is lit, it indicates that a non-critical event has occurred. Check the error log for additional information. See the information about light path diagnostics in the Problem Determination and Service Guide for more information about error logs. - Hard drive activity LED: When this green LED is lit, it indicates that one of the hard disk drives is in use. Notes: 1. Hard disk drive activity LEDs for the SAS drives are in two places: on the hard disk drive and on the operator information panel. 2. There is no hard disk drive activity LED on a SATA drive. The only hard disk drive activity LED is on the operator information panel. - Power-control button: Press this button to turn the server on and off manually. Note: The server can also be turned on or off by a command to the BMC. For more information about using this feature of the BMC, see the User's Guide on the IBM System x Documentation CD. v Rack release latches: Press the latches on each front side of the server to remove the server from the rack. v Video connector: Connect a monitor to this connector. The video connectors on the front and rear of the server can be used simultaneously. v USB connectors: Connect a USB device, such as a USB mouse, keyboard, or other device to any of these connectors. v CD-RW/DVD eject button: Press this button to release a DVD or CD from the CD/DVD drive. v CD-RW/DVD drive activity LED: When this LED is lit, it indicates that the CD-RW/DVD drive is in use. v Hard disk drive status LED: This LED is used on SAS hard disk drives. When this LED is lit, it indicates that the drive has failed. If an optional IBM ServeRAID™ controller is installed in the server, when this LED is flashing slowly 30 IBM System x3550 Type 7978: Installation Guide

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–
Power-on
LED:
When
this
green
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
is
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.
A
power
LED
is
also
on
the
rear
of
the
server.
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
cord
from
the
electrical
outlet.
–
System
locator
LED:
Use
this
blue
LED
to
visually
locate
the
server
if
it
is
in
a
location
with
other
servers.
You
can
use
IBM
Director
to
light
this
LED
remotely.
This
LED
is
controlled
by
the
BMC.
–
System-error
LED:
When
this
amber
LED
is
lit,
it
indicates
that
a
system
error
has
occurred.
A
system-error
LED
is
also
on
the
rear
of
the
server.
An
LED
on
the
light
path
diagnostics
panel
on
the
system
board
is
also
lit
to
help
isolate
the
error.
This
LED
is
controlled
by
the
BMC.
–
Release
Latch:
Press
the
release
latch
to
the
left
to
slide
out
the
operator
information
panel
and
view
the
light
path
diagnostics
panel.
See
the
Problem
Determination
and
Service
Guide
for
more
information
about
the
light
path
diagnostics
panel.
–
System
information
LED:
When
this
amber
LED
is
lit,
it
indicates
that
a
non-critical
event
has
occurred.
Check
the
error
log
for
additional
information.
See
the
information
about
light
path
diagnostics
in
the
Problem
Determination
and
Service
Guide
for
more
information
about
error
logs.
–
Hard
drive
activity
LED:
When
this
green
LED
is
lit,
it
indicates
that
one
of
the
hard
disk
drives
is
in
use.
Notes:
1.
Hard
disk
drive
activity
LEDs
for
the
SAS
drives
are
in
two
places:
on
the
hard
disk
drive
and
on
the
operator
information
panel.
2.
There
is
no
hard
disk
drive
activity
LED
on
a
SATA
drive.
The
only
hard
disk
drive
activity
LED
is
on
the
operator
information
panel.
–
Power-control
button:
Press
this
button
to
turn
the
server
on
and
off
manually.
Note:
The
server
can
also
be
turned
on
or
off
by
a
command
to
the
BMC.
For
more
information
about
using
this
feature
of
the
BMC,
see
the
User’s
Guide
on
the
IBM
System
x
Documentation
CD.
v
Rack
release
latches:
Press
the
latches
on
each
front
side
of
the
server
to
remove
the
server
from
the
rack.
v
Video
connector:
Connect
a
monitor
to
this
connector.
The
video
connectors
on
the
front
and
rear
of
the
server
can
be
used
simultaneously.
v
USB
connectors:
Connect
a
USB
device,
such
as
a
USB
mouse,
keyboard,
or
other
device
to
any
of
these
connectors.
v
CD-RW/DVD
eject
button:
Press
this
button
to
release
a
DVD
or
CD
from
the
CD/DVD
drive.
v
CD-RW/DVD
drive
activity
LED:
When
this
LED
is
lit,
it
indicates
that
the
CD-RW/DVD
drive
is
in
use.
v
Hard
disk
drive
status
LED:
This
LED
is
used
on
SAS
hard
disk
drives.
When
this
LED
is
lit,
it
indicates
that
the
drive
has
failed.
If
an
optional
IBM
ServeRAID
™
controller
is
installed
in
the
server,
when
this
LED
is
flashing
slowly
30
IBM
System
x3550
Type
7978:
Installation
Guide