IBM 419452u Installation Guide - Page 41

Server, controls, power

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Chapter 3. Server controls, LEDs, and power Front view This chapter describes the controls and light-emitting diodes (LEDs) and how to turn the server on and off. The following illustration shows the controls, light-emitting diodes (LEDs), and connectors on the front of the server. Reset button Power-control button Power-on LED Hard disk drive activity LED Locator LED System-error LED USB 1 connector USB 2 connector CD-eject button CD drive activity LED 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 cord from the electrical outlet. Power-control button: Press this button to turn the server on and off manually. A power-control-button shield comes installed around the button to prevent the server from being turned off accidentally. You can remove this disk-shaped shield if you prefer. Reset button: Press this button to reset the server and run the power-on self-test (POST). You might have to use a pen or the end of a straightened paper clip to press the button. Hard disk drive activity LED: When this LED is flashing, it indicates that a hard disk drive is in use. Locator LED: This LED can be lit remotely by the system administrator to aid in visually locating the server. You can use IBM Director to light this LED remotely. System-error LED: When this LED is lit, it indicates that a system error has occurred. An LED on the system board might also be lit to help isolate the error. See Chapter 5, "Solving problems," on page 35 for additional information. USB connectors: Connect a USB device to either of these connectors. CD-eject button: Press this button to release a CD from the CD drive. CD drive activity LED: When this LED is lit, it indicates that the CD drive is in use. © Copyright IBM Corp. 2007, 2008 27

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Chapter
3.
Server
controls,
LEDs,
and
power
This
chapter
describes
the
controls
and
light-emitting
diodes
(LEDs)
and
how
to
turn
the
server
on
and
off.
Front
view
The
following
illustration
shows
the
controls,
light-emitting
diodes
(LEDs),
and
connectors
on
the
front
of
the
server.
Power-on LED
Power-control button
Reset button
Hard disk drive activity LED
Locator LED
System-error LED
USB 1 connector
USB 2 connector
CD-eject button
CD drive activity LED
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
cord
from
the
electrical
outlet.
Power-control
button:
Press
this
button
to
turn
the
server
on
and
off
manually.
A
power-control-button
shield
comes
installed
around
the
button
to
prevent
the
server
from
being
turned
off
accidentally.
You
can
remove
this
disk-shaped
shield
if
you
prefer.
Reset
button:
Press
this
button
to
reset
the
server
and
run
the
power-on
self-test
(POST).
You
might
have
to
use
a
pen
or
the
end
of
a
straightened
paper
clip
to
press
the
button.
Hard
disk
drive
activity
LED:
When
this
LED
is
flashing,
it
indicates
that
a
hard
disk
drive
is
in
use.
Locator
LED:
This
LED
can
be
lit
remotely
by
the
system
administrator
to
aid
in
visually
locating
the
server.
You
can
use
IBM
Director
to
light
this
LED
remotely.
System-error
LED:
When
this
LED
is
lit,
it
indicates
that
a
system
error
has
occurred.
An
LED
on
the
system
board
might
also
be
lit
to
help
isolate
the
error.
See
Chapter
5,
“Solving
problems,”
on
page
35
for
additional
information.
USB
connectors:
Connect
a
USB
device
to
either
of
these
connectors.
CD-eject
button:
Press
this
button
to
release
a
CD
from
the
CD
drive.
CD
drive
activity
LED:
When
this
LED
is
lit,
it
indicates
that
the
CD
drive
is
in
use.
©
Copyright
IBM
Corp.
2007,
2008
27