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
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.
50
IBM
System
x3655
Type
7985
and
7943:
Problem
Determination
and
Service
Guide
Summary of Contents for 7985
Page 1: ...IBM System x3655 Type 7985 and 7943 Problem Determination and Service Guide...
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Page 3: ...IBM System x3655 Type 7985 and 7943 Problem Determination and Service Guide...
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Page 110: ...92 IBM System x3655 Type 7985 and 7943 Problem Determination and Service Guide...
Page 112: ...View 1...
Page 159: ...Battery Chapter 5 Removing and replacing server components 141...
Page 202: ...184 IBM System x3655 Type 7985 and 7943 Problem Determination and Service Guide...
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Page 218: ...Part Number 42D2167 Printed in USA 1P P N 42D2167...