3.
Verify
that
the
power
cord
is
properly
connected
to
an
AC
power
outlet.
4.
Verify
that
you
are
using
a
good
AC
power
outlet.
Plug
another
device
into
the
outlet
or
contact
the
power
company
or
supplier
to
verify
that
the
outlet
is
working
correctly
.
5.
Check
the
power
cord
continuity.
6.
Replace
the
AC/DC
power
adapter.
7.
Verify
that
the
power
cord
from
the
AC/DC
power
adapter
to
the
computer
is
properly
connected.
See
“Connectors
on
the
rear
of
the
computer”
on
page
81.
8.
Open
the
cover.
See
“Opening
the
cover”
on
page
84.
9.
Check
the
Power
switch/LED
assembly
connector
on
the
system
board.
See
“System
board
locations”
on
page
83.
Reseat
the
cable
from
the
Power
switch/LED
assembly
to
the
system
board.
10.
Replace
the
power
switch/LED
assembly.
11.
Replace
the
system
board.
See
“Replacing
the
system
board”
on
page
89.
Problem
determination
tips
Due
to
the
variety
of
hardware
and
software
combinations
that
can
be
encountered,
use
the
following
information
to
assist
you
in
problem
determination.
If
possible,
have
this
information
available
when
requesting
assistance
from
Service
Support
and
Engineering
functions.
v
Machine
type
and
model
v
Processor
or
hard
disk
upgrades
v
Failure
symptom
–
Do
diagnostics
indicate
a
failure?
–
What,
when,
where,
single,
or
multiple
systems?
–
Is
the
failure
repeatable?
–
Has
this
configuration
ever
worked?
–
If
it
has
been
working,
what
changes
were
made
prior
to
it
failing?
–
Is
this
the
original
reported
failure?
v
Diagnostics
version
–
Type
and
version
level
v
Hardware
configuration
–
screen)
configuration
currently
in
use
–
BIOS
level
v
Operating
system
software
–
Type
and
version
level
Note:
To
eliminate
confusion,
identical
systems
are
considered
identical
only
if
they:
1.
Are
the
exact
machine
type
and
models
2.
Have
the
same
BIOS
level
3.
Have
the
same
adapters/attachments
in
the
same
locations
4.
Have
the
same
address
jumpers/terminators/cabling
5.
Have
the
same
software
versions
and
levels
6.
Have
the
same
Diagnostic
Diskettes
(version)
7.
Have
the
same
configuration
options
set
in
the
system
8.
Have
the
same
setup
for
the
operating
system
control
files
40
Hardware
Maintenance
Manual
Summary of Contents for ThinkCentre 6417
Page 1: ...ThinkCentre Hardware Maintenance Manual Machine Types 6417 6418 6449 6453 ...
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Page 17: ...Chapter 2 Safety information 11 ...
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Page 117: ...6417 Vista Business 32 Recovery DVDs FRU CRU RE models 1 Chapter 9 FRU lists 111 ...
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Page 144: ...Part Number 43C6257 Printed in USA 1P P N 43C6257 ...