IBM 887022X Installation Guide - Page 88

Light, diagnostics, feature, overview

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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. NOTE: FOR PROPER FRONT OF BOX AIRFLOW, NOTE: FOR PROPER AIRFLOW, FRONT OF BOX REPLACE FAN WITHIN 2 MINUTES REPLACE FAN WITHIN 2 MINUTES FAN 1 2 SUPPOPWLYER PCDI ABMSUDESCMPOURY TEMP REMINODVNEROVNSRPRMEECDEVEBNOTNAMRLODI G i ! CPU MEMORY Light Path Diagnostics DASD PCI-X BUS NMI BOARD FAN TEMP EVENT LOG 1 POWER 2 SUPPLY VRM NON REDUND OVER SPEC REMIND Figure 58. Light path diagnostics 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 "Light path diagnostics table" on page 78 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. 76 xSeries 445 Type 8870: Installation Guide

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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
“Light
path
diagnostics
table”
on
page
78
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.
CPU
VRM
MEMORY
DASD
NMI
BOARD
EVENT LOG
FAN
POWER
SUPPLY
PCI BUS
2
1
NON RED
OVER SPEC
TEMP
REMIND
i
!
NOTE:
FOR PROPER AIRFLOW, REPLACE FAN WITHIN 2 MINUTES
FRONT OF BOX
NOTE:
FOR PROPER AIRFLOW, REPLACE FAN WITHIN 2 MINUTES
FRONT OF BOX
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