IBM x3550 Installation Guide - Page 83

Diagnosing, problems, using, light, diagnostics, Light - spec

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When LEDs are lit to indicate an error, they remain lit when the server is turned off, provided that the server is still connected to power and the power supply is operating correctly. To acknowledge a system error but not take immediate action, press the remind button and place light path diagnostics in remind mode. When the server is in Remind mode, the system-error LED on the front of the server flashes. If a new failure occurs, the system-error LED is lit again. Press the reset button to reset the server and run the power-on self-test (POST). You might have to use a pen or the end of a straightened paper clip to press the button. Light Path Diagnostics REMIND OVER SPEC PS1 PS2 CPU VRM CNFG MEM NMI S ERR SP DASD RAID FAN TEMP BRD PCI The server is designed so that LEDs remain lit when the server is connected to an ac power source but is not turned on, provided that the power supply is operating correctly. This feature helps you to isolate the problem when the operating system is shut down. Diagnosing problems using light path diagnostics LEDs in two locations on the server are available to help you diagnose problems that might occur during installation. Use them in the following order: 1. Light path diagnostics panel - Look at this panel first. If a system error has occurred, the system-error LED on the front of the light path diagnostics drawer is lit. Slide the latch to the left on the front of the light path diagnostics drawer to access the light path diagnostics panel. Note any LEDs that are lit, and then close the drawer. 2. LEDs on the system board - To identify the component that is causing the error, note the lit LED on or beside the component. Light path diagnostics LEDs The following table lists the LEDs on the light path diagnostics panel, the problems that they indicate, and actions to solve the problems. Chapter 5. Solving problems 69

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When
LEDs
are
lit
to
indicate
an
error,
they
remain
lit
when
the
server
is
turned
off,
provided
that
the
server
is
still
connected
to
power
and
the
power
supply
is
operating
correctly.
To
acknowledge
a
system
error
but
not
take
immediate
action,
press
the
remind
button
and
place
light
path
diagnostics
in
remind
mode.
When
the
server
is
in
Remind
mode,
the
system-error
LED
on
the
front
of
the
server
flashes.
If
a
new
failure
occurs,
the
system-error
LED
is
lit
again.
Press
the
reset
button
to
reset
the
server
and
run
the
power-on
self-test
(POST).
You
might
have
to
use
a
pen
or
the
end
of
a
straightened
paper
clip
to
press
the
button.
DASD
NMI
PCI
PS1
SP
PS2
CNFG
MEM
CPU
FAN
VRM
OVER SPEC
TEMP
REMIND
S ERR
Light Path
Diagnostics
RAID
BRD
The
server
is
designed
so
that
LEDs
remain
lit
when
the
server
is
connected
to
an
ac
power
source
but
is
not
turned
on,
provided
that
the
power
supply
is
operating
correctly.
This
feature
helps
you
to
isolate
the
problem
when
the
operating
system
is
shut
down.
Diagnosing
problems
using
light
path
diagnostics
LEDs
in
two
locations
on
the
server
are
available
to
help
you
diagnose
problems
that
might
occur
during
installation.
Use
them
in
the
following
order:
1.
Light
path
diagnostics
panel
-
Look
at
this
panel
first.
If
a
system
error
has
occurred,
the
system-error
LED
on
the
front
of
the
light
path
diagnostics
drawer
is
lit.
Slide
the
latch
to
the
left
on
the
front
of
the
light
path
diagnostics
drawer
to
access
the
light
path
diagnostics
panel.
Note
any
LEDs
that
are
lit,
and
then
close
the
drawer.
2.
LEDs
on
the
system
board
-
To
identify
the
component
that
is
causing
the
error,
note
the
lit
LED
on
or
beside
the
component.
Light
path
diagnostics
LEDs
The
following
table
lists
the
LEDs
on
the
light
path
diagnostics
panel,
the
problems
that
they
indicate,
and
actions
to
solve
the
problems.
Chapter
5.
Solving
problems
69