IBM 8863 Service Guide - Page 65

Light Path, Diagnostics - spec

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Many errors are first indicated by a lit information LED or system-error LED on the operator information panel on the front of the server. If one or both of these LEDs are lit, one or more LEDs elsewhere in the server might also be lit and can direct you to the source of the error. Note: Read the safety information beginning on page vii and "Handling static-sensitive devices" on page 100. View the LEDs in the following order: 1. Check the operator information panel on the front of the server. v If the information LED is lit, it indicates that information about a suboptimal condition in the server is available in the BMC log or in the system-error log. Important: If the server has a baseboard management controller, clear the BMC log and system-event log after you resolve all conditions. This will turn off the information LED and LOG LED, if all conditions are resolved. v If the system-error LED is lit, it indicates that an error has occurred; go to step 2. The following illustration shows the operator information panel. Power-control button Information LED USB connector Release latch Power-on LED Hard disk drive activity LED System-error LED Locator LED 2. To view the light path diagnostics panel, press the release latch on the front of the operator information panel to the left; then, slide it forward. This reveals the light path diagnostics panel. Lit LEDs on this panel indicate the type of error that has occurred. Light Path Diagnostics REMIND OVER SPEC PS LINK CPU VRM LOG MEM NMI PCI SP DASD RAID NONRED TEMP FAN PCI CPU I/O BRD BRD BRD Look at the system service label on the top of the server, which gives an overview of internal components that correspond to the LEDs on the light path Chapter 2. Diagnostics 49

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Many
errors
are
first
indicated
by
a
lit
information
LED
or
system-error
LED
on
the
operator
information
panel
on
the
front
of
the
server.
If
one
or
both
of
these
LEDs
are
lit,
one
or
more
LEDs
elsewhere
in
the
server
might
also
be
lit
and
can
direct
you
to
the
source
of
the
error.
Note:
Read
the
safety
information
beginning
on
page
vii
and
“Handling
static-sensitive
devices”
on
page
100.
View
the
LEDs
in
the
following
order:
1.
Check
the
operator
information
panel
on
the
front
of
the
server.
v
If
the
information
LED
is
lit,
it
indicates
that
information
about
a
suboptimal
condition
in
the
server
is
available
in
the
BMC
log
or
in
the
system-error
log.
Important:
If
the
server
has
a
baseboard
management
controller,
clear
the
BMC
log
and
system-event
log
after
you
resolve
all
conditions.
This
will
turn
off
the
information
LED
and
LOG
LED,
if
all
conditions
are
resolved.
v
If
the
system-error
LED
is
lit,
it
indicates
that
an
error
has
occurred;
go
to
step
2.
The
following
illustration
shows
the
operator
information
panel.
Power-control button
Power-on LED
USB connector
Hard disk drive activity LED
Information LED
System-error LED
Locator LED
Release latch
2.
To
view
the
light
path
diagnostics
panel,
press
the
release
latch
on
the
front
of
the
operator
information
panel
to
the
left;
then,
slide
it
forward.
This
reveals
the
light
path
diagnostics
panel.
Lit
LEDs
on
this
panel
indicate
the
type
of
error
that
has
occurred.
DASD
NMI
PCI
BRD
I/O
BRD
PS
NONRED
SP
LINK
RAID
MEM
CPU
CPU
BRD
FAN
PCI
VRM
OVER SPEC
TEMP
REMIND
LOG
Light Path
Diagnostics
Look
at
the
system
service
label
on
the
top
of
the
server,
which
gives
an
overview
of
internal
components
that
correspond
to
the
LEDs
on
the
light
path
Chapter
2.
Diagnostics
49