Light
path
diagnostics
feature
overview
Use
the
light
path
diagnostics
to
quickly
identify
the
system
errors
that
occurred
in
that
server.
The
light
path
diagnostics
panel
is
located
inside
the
light
path
diagnostics
drawer,
on
the
front
right
of
the
server.
To
access
the
light
path
diagnostics
panel,
press
on
the
front
of
the
light
path
diagnostics
drawer.
The
light
path
diagnostics
panel
will
be
exposed.
Your
server
is
designed
so
that
any
light
path
diagnostics
LEDs
that
are
lit
can
be
lit
again
without
ac
power
after
you
open
the
cover.
This
feature
helps
you
isolate
a
problem
if
an
error
causes
the
server
to
shut
down.
See
for
information
about
identifying
problems
using
these
LEDs.
Important:
You
have
up
to
12
hours
to
use
the
light
path
diagnostics
LEDs
after
ac
power
has
been
removed
from
the
server.
After
12
hours,
you
must
turn
on
the
server
again
to
be
able
to
use
the
light
path
diagnostics
LEDs
to
identify
system
errors.
Complete
the
following
steps
to
view
the
LEDs
when
the
server
cover
has
been
opened:
1.
Turn
off
the
server
and
all
peripheral
devices;
then,
disconnect
all
external
cables
from
the
server.
2.
Slide
the
server
out
of
the
rack
cabinet.
3.
Open
the
top
cover.
CP
U
VR
M
M
EM
O
RY
DA
SD
NM
I
BO
AR
D
EV
EN
T L
O
G
FA
N
PO
W
ER
SU
PP
LY
PC
I B
US
2
1
NO
N R
ED
OV
ER
S
PE
C
TE
M
P
RE
M
IN
D
i
!
NO
TE
:
FO
R P
RO
PE
R A
IR
FLO
W,
RE
PL
AC
E F
AN
W
ITH
IN 2
M
INU
TE
S
FR
ON
T O
F B
OX
NO
TE
:
FO
R P
RO
PE
R A
IRF
LO
W,
RE
PL
AC
E F
AN
W
ITH
IN 2
M
INU
TE
S
FR
ON
T O
F B
OX
CPU
VRM
MEMORY
DASD
NMI
BOARD
EVENT LOG
FAN
POWER
SUPPLY
PCI-X BUS
2
1
NON REDUND
OVER SPEC
TEMP
REMIND
Light Path
Diagnostics
Figure
58.
Light
path
diagnostics
76
xSeries
445
Type
8870:
Installation
Guide
Summary of Contents for eServer 445 xSeries
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