IBM x3655 Service Guide - Page 157

Light Path, Diagnostics - specs

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Power-on LED Hard disk drive activity LED Information Release LED latch Power-control button System locator LED System-error LED 2. To view the light path diagnostics panel, slide the latch to the left on the front of the light path diagnostics panel. This reveals the light path diagnostics panel. Lit LEDs on this panel indicate the type of error that has occurred. The following illustration shows the light path diagnostics panel. REMIND Light Path Diagnostics OVER SPEC PS1 PS2 CPU VRM CNFG MEM NMI S ERR SP DASD RAID FAN TEMP BRD PCI Note any LEDs that are lit, and then push the light path diagnostics panel back into the server. 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 diagnostics panel. This information and the information in "Light path diagnostics LEDs" on page 141 can often provide enough information to diagnose the error. 3. Remove the server cover and look inside the server for lit LEDs. A lit LED on or beside a component identifies the component that is causing the error. The following illustration shows the LEDs on the system board. Chapter 5. Diagnostics 139

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Power-control
button
Power-on
LED
Hard disk drive
activity LED
System
locator
LED
Information
LED
System-error
LED
Release
latch
2.
To
view
the
light
path
diagnostics
panel,
slide
the
latch
to
the
left
on
the
front
of
the
light
path
diagnostics
panel.
This
reveals
the
light
path
diagnostics
panel.
Lit
LEDs
on
this
panel
indicate
the
type
of
error
that
has
occurred.
The
following
illustration
shows
the
light
path
diagnostics
panel.
DASD
NMI
PCI
PS1
SP
PS2
CNFG
MEM
CPU
FAN
VRM
OVER SPEC
TEMP
REMIND
S ERR
Light Path
Diagnostics
RAID
BRD
Note
any
LEDs
that
are
lit,
and
then
push
the
light
path
diagnostics
panel
back
into
the
server.
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
diagnostics
panel.
This
information
and
the
information
in
“Light
path
diagnostics
LEDs”
on
page
141
can
often
provide
enough
information
to
diagnose
the
error.
3.
Remove
the
server
cover
and
look
inside
the
server
for
lit
LEDs.
A
lit
LED
on
or
beside
a
component
identifies
the
component
that
is
causing
the
error.
The
following
illustration
shows
the
LEDs
on
the
system
board.
Chapter
5.
Diagnostics
139