IBM 88410EU User Manual - Page 104

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1 POWER SUPPLY 2 CONFIG TEMP REMIND MEMORY DASD/ RAID FAN CPU S_ERR VRM PCI BUS SERVICE NMI PROCESSOR BUS 3. Once you know the general type of error and the general location of the component involved, the next step is to check the system service label on the outside of the server. This label gives an overview of internal components that correspond to many of the LEDs on the light path diagnostics panel and can help to view lit LEDs inside the server. Note: Some of the LEDs on the light path diagnostics panel will not have a corresponding LED lit on the system board. For example: v LEDs for the power supplies, fans, and hard disk drives are located on or near the individual component. v Some error conditions are corrected by taking an action not related to one particular component; see step 5. 4. If the lit LED on the light path diagnostics panel refers to a specific internal component as indicated in step 3, look on the system board for lit error LEDs (see "System-board LEDs" on page 83). For example, a microprocessor error will light the LED next to the failing microprocessor. The error LEDs on the system board will only be lit when there is power to the server. To view them, read "Working inside the server with the power on" on page 12; then, remove the cover and look for any lit error LEDs. If the lit LED on the light path diagnostics panel does not refer to a specific internal component, continue with step 5. 5. Go to the table at "Light path diagnostic errors" on page 114 and find the entry for the associated lit LED; then, replace the indicated component or take the indicated action. Notes: v The system-error log and the BMC log might contain additional information that will be helpful before replacing a component. v If an LED on the light path diagnostics panel is lit and the system-error LED is not lit, there is probably an LED problem. Run LED diagnostics. 94 xSeries 236 Type 8841: Hardware Maintenance Manual and Troubleshooting Guide

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CPU
VRM
S_ERR
MEMORY
DASD/
RAID
NMI
SERVICE
PROCESSOR
BUS
FAN
POWER
SUPPLY
PCI
BUS
2
1
CONFIG
TEMP
REMIND
3.
Once
you
know
the
general
type
of
error
and
the
general
location
of
the
component
involved,
the
next
step
is
to
check
the
system
service
label
on
the
outside
of
the
server.
This
label
gives
an
overview
of
internal
components
that
correspond
to
many
of
the
LEDs
on
the
light
path
diagnostics
panel
and
can
help
to
view
lit
LEDs
inside
the
server.
Note:
Some
of
the
LEDs
on
the
light
path
diagnostics
panel
will
not
have
a
corresponding
LED
lit
on
the
system
board.
For
example:
v
LEDs
for
the
power
supplies,
fans,
and
hard
disk
drives
are
located
on
or
near
the
individual
component.
v
Some
error
conditions
are
corrected
by
taking
an
action
not
related
to
one
particular
component;
see
step
5.
4.
If
the
lit
LED
on
the
light
path
diagnostics
panel
refers
to
a
specific
internal
component
as
indicated
in
step
3,
look
on
the
system
board
for
lit
error
LEDs
(see
“System-board
LEDs”
on
page
83).
For
example,
a
microprocessor
error
will
light
the
LED
next
to
the
failing
microprocessor.
The
error
LEDs
on
the
system
board
will
only
be
lit
when
there
is
power
to
the
server.
To
view
them,
read
“Working
inside
the
server
with
the
power
on”
on
page
12;
then,
remove
the
cover
and
look
for
any
lit
error
LEDs.
If
the
lit
LED
on
the
light
path
diagnostics
panel
does
not
refer
to
a
specific
internal
component,
continue
with
step
5.
5.
Go
to
the
table
at
“Light
path
diagnostic
errors”
on
page
114
and
find
the
entry
for
the
associated
lit
LED;
then,
replace
the
indicated
component
or
take
the
indicated
action.
Notes:
v
The
system-error
log
and
the
BMC
log
might
contain
additional
information
that
will
be
helpful
before
replacing
a
component.
v
If
an
LED
on
the
light
path
diagnostics
panel
is
lit
and
the
system-error
LED
is
not
lit,
there
is
probably
an
LED
problem.
Run
LED
diagnostics.
94
xSeries
236
Type
8841:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide