IBM JS20 User Guide - Page 28

Notes - diagnostic

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System-board LEDs The following illustration shows the location of the LEDs on the system board. You might need to refer to this illustration when solving problems with the blade server. You must remove the blade server from the BladeCenter unit, open the cover, and press the light path diagnostics button (SW1) to light any error LEDs that were turned on during processing. Notes: v Power is available to light the light path diagnostics LEDs for a short period of time after the blade server is removed from the BladeCenter unit. During that period of time, you can light the light path diagnostics LEDs for a maximum of 25 seconds (or less, depending on the number of LEDs that are lit and the length of time the blade server is removed from the BladeCenter unit) by pressing the light path diagnostics button (SW1). v Error LED CR29 is not used. v For the locations of the corresponding DIMM sockets and microprocessor connectors on the system board, see the illustration in "System-board internal and option connectors" on page 15. DIMM 3 error LED (CR46) DIMM 1 error LED (CR40) DIMM 2 error LED (CR45) DIMM 4 error LED (CR53) Microprocessor 0 error LED (CR19) Temperature error LED (CR16) Light Path Diagnostics (SW1) Microprocessor 1 error LED (CR58) Service processor error LED (CR27) NMI error LED (CR17) System board error LED (CR20) Reserved (CR29) 16 BladeCenter JS20 Type 8842: Installation and User's Guide

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System-board
LEDs
The
following
illustration
shows
the
location
of
the
LEDs
on
the
system
board.
You
might
need
to
refer
to
this
illustration
when
solving
problems
with
the
blade
server.
You
must
remove
the
blade
server
from
the
BladeCenter
unit,
open
the
cover,
and
press
the
light
path
diagnostics
button
(SW1)
to
light
any
error
LEDs
that
were
turned
on
during
processing.
Notes:
v
Power
is
available
to
light
the
light
path
diagnostics
LEDs
for
a
short
period
of
time
after
the
blade
server
is
removed
from
the
BladeCenter
unit.
During
that
period
of
time,
you
can
light
the
light
path
diagnostics
LEDs
for
a
maximum
of
25
seconds
(or
less,
depending
on
the
number
of
LEDs
that
are
lit
and
the
length
of
time
the
blade
server
is
removed
from
the
BladeCenter
unit)
by
pressing
the
light
path
diagnostics
button
(SW1).
v
Error
LED
CR29
is
not
used.
v
For
the
locations
of
the
corresponding
DIMM
sockets
and
microprocessor
connectors
on
the
system
board,
see
the
illustration
in
“System-board
internal
and
option
connectors”
on
page
15.
DIMM 1 error
LED (CR40)
DIMM 3 error
LED (CR46)
DIMM 2 error
LED (CR45)
DIMM 4 error
LED (CR53)
Microprocessor 1
error LED (CR58)
Microprocessor 0
error LED (CR19)
Temperature
error LED (CR16)
NMI error
LED (CR17)
System board
error LED (CR20)
Service processor
error LED (CR27)
Light Path Diagnostics
(SW1)
Reserved (CR29)
16
BladeCenter
JS20
Type
8842:
Installation
and
User’s
Guide