IBM x3400 User Guide - Page 36

System-board, Installation, guidelines - diagnostics

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System-board LEDs The following illustration shows the light-emitting diodes (LEDs) on the system board. DIMM error LEDs 1 through 12 Microprocessor mismatch LED DIMM LEDs 6 12 5 11 4 10 39 28 17 Slot 1 error LED Slot 2 error LED Slot 3 error LED Slot 4 error LED Slot 5 error LED Slot 6 error LED Microprocessor 1 error LED Microprocessor 2 error LED VRM error LED Battery LED BMC heartbeat LED ServeRAID error LED For more information about the system-board LEDs, see the Problem Determination and Service Guide on the IBM System x3400 Documentation CD. Installation guidelines Before you install options, read the following information: v Read the safety information that begins on page v, the guidelines in "Working inside the server with the power on" on page 23, and "Handling static-sensitive devices" on page 24. This information will help you work safely. v Before you install optional hardware, make sure that the server is working correctly. Start the server, and make sure that the operating system starts, if an operating system is installed, or that a 19990305 error code is displayed, indicating that an operating system was not found but the server is otherwise working correctly. If the server is not working correctly, see the Problem Determination and Service Guide for diagnostic information. v Observe good housekeeping in the area where you are working. Place removed covers and other parts in a safe place. v If you must start the server while the cover is removed, make sure that no one is near the server and that no tools or other objects have been left inside the server. v Do not attempt to lift an object that you think is too heavy for you. If you have to lift a heavy object, observe the following precautions: 22 System x3400 Types 7973, 7974, 7975, and 7976: User's Guide

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System-board
LEDs
The
following
illustration
shows
the
light-emitting
diodes
(LEDs)
on
the
system
board.
1
2
3
4
5
6
7
8
9
10
11
12
DIMM LEDs
Slot 1
error LED
Slot 2
error LED
Slot 3
error LED
Slot 4
error LED
Slot 5
error LED
Slot 6
error LED
Microprocessor
mismatch
LED
DIMM
error LEDs
1 through 12
Microprocessor 1
error LED
Microprocessor 2
error LED
VRM error
LED
BMC heartbeat
LED
ServeRAID
error LED
Battery LED
For
more
information
about
the
system-board
LEDs,
see
the
Problem
Determination
and
Service
Guide
on
the
IBM
System
x3400
Documentation
CD.
Installation
guidelines
Before
you
install
options,
read
the
following
information:
v
Read
the
safety
information
that
begins
on
page
v,
the
guidelines
in
“Working
inside
the
server
with
the
power
on”
on
page
23,
and
“Handling
static-sensitive
devices”
on
page
24.
This
information
will
help
you
work
safely.
v
Before
you
install
optional
hardware,
make
sure
that
the
server
is
working
correctly.
Start
the
server,
and
make
sure
that
the
operating
system
starts,
if
an
operating
system
is
installed,
or
that
a
19990305
error
code
is
displayed,
indicating
that
an
operating
system
was
not
found
but
the
server
is
otherwise
working
correctly.
If
the
server
is
not
working
correctly,
see
the
Problem
Determination
and
Service
Guide
for
diagnostic
information.
v
Observe
good
housekeeping
in
the
area
where
you
are
working.
Place
removed
covers
and
other
parts
in
a
safe
place.
v
If
you
must
start
the
server
while
the
cover
is
removed,
make
sure
that
no
one
is
near
the
server
and
that
no
tools
or
other
objects
have
been
left
inside
the
server.
v
Do
not
attempt
to
lift
an
object
that
you
think
is
too
heavy
for
you.
If
you
have
to
lift
a
heavy
object,
observe
the
following
precautions:
22
System
x3400
Types
7973,
7974,
7975,
and
7976:
User’s
Guide