IBM QS21 User Guide - Page 28

System, board

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Power on LED: This green LED indicates the power status of the blade server as follows: v Flashing rapidly - The service processor on the blade server is communicating with the BladeCenter Advanced Management Module. v Flashing slowly - The blade server has power but is not turned on. v Lit continuously (steady) - The blade server has power and is turned on. v Not lit. Either the BladeCenter unit is powered off, or a power failure has occurred on the blade server or the BladeCenter unit. NMI reset button If the operating system has been installed, pressing this with a paper clip or pin causes the operating system to call the system debugger. Note: The blade error LED, information LED, and location LED can be turned off through the BladeCenter Management Module Web interface. For additional information about errors, see "Problems indicated by the front panel LEDs" on page 60. System board LEDs The BladeCenter QS21 has status LEDs on the system board to indicate the health of various components. Some are within the light box while others are in different location. A lit LEDs indicates an error condition. Complete information about the LEDs can be found in the Problem Determination and Service Guide. To find out what if any errors have occurred on the system board, you must: 1. Remove the blade server from the BladeCenter unit 2. Open the cover 3. Press the light path diagnostics switch This lights any error LEDs that were turned on during processing. It also lights a green LED to indicate the capacitor is charged and the light path diagnostics system is operating. Figure 5 on page 13 shows the location of the light path LEDs and the diagnostics switch. 12 QS21 Installation and User's Guide

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Power
on
LED:
This
green
LED
indicates
the
power
status
of
the
blade
server
as
follows:
v
Flashing
rapidly
-
The
service
processor
on
the
blade
server
is
communicating
with
the
BladeCenter
Advanced
Management
Module.
v
Flashing
slowly
-
The
blade
server
has
power
but
is
not
turned
on.
v
Lit
continuously
(steady)
-
The
blade
server
has
power
and
is
turned
on.
v
Not
lit.
Either
the
BladeCenter
unit
is
powered
off,
or
a
power
failure
has
occurred
on
the
blade
server
or
the
BladeCenter
unit.
NMI
reset
button
If
the
operating
system
has
been
installed,
pressing
this
with
a
paper
clip
or
pin
causes
the
operating
system
to
call
the
system
debugger.
Note:
The
blade
error
LED,
information
LED,
and
location
LED
can
be
turned
off
through
the
BladeCenter
Management
Module
Web
interface.
For
additional
information
about
errors,
see
“Problems
indicated
by
the
front
panel
LEDs”
on
page
60.
System
board
LEDs
The
BladeCenter
QS21
has
status
LEDs
on
the
system
board
to
indicate
the
health
of
various
components.
Some
are
within
the
light
box
while
others
are
in
different
location.
A
lit
LEDs
indicates
an
error
condition.
Complete
information
about
the
LEDs
can
be
found
in
the
Problem
Determination
and
Service
Guide
.
To
find
out
what
if
any
errors
have
occurred
on
the
system
board,
you
must:
1.
Remove
the
blade
server
from
the
BladeCenter
unit
2.
Open
the
cover
3.
Press
the
light
path
diagnostics
switch
This
lights
any
error
LEDs
that
were
turned
on
during
processing.
It
also
lights
a
green
LED
to
indicate
the
capacitor
is
charged
and
the
light
path
diagnostics
system
is
operating.
Figure
5
on
page
13
shows
the
location
of
the
light
path
LEDs
and
the
diagnostics
switch.
12
QS21
Installation
and
User’s
Guide