Chapter
9.
Removing
or
replacing
a
FRU
This
chapter
provides
instructions
on
how
to
remove
or
replace
a
FRU.
CRU
statement
for
customers
:
You
can
resolve
some
problems
with
your
product
with
a
replacement
part
you
can
install
yourself,
called
a
“Customer
Replaceable
Unit”
or
“CRU.”
Some
CRUs
are
designated
as
self-service
CRUs
and
others
are
designated
as
optional-service
CRUs.
Installation
of
self-service
CRUs
is
your
responsibility.
For
optional-service
CRUs,
you
can
either
install
the
CRU
yourself
or
you
can
request
that
a
Service
Provider
install
the
CRU
according
to
the
warranty
service
for
your
product.
If
you
intend
on
installing
the
CRU,
Lenovo
will
ship
the
CRU
to
you.
CRU
information
and
replacement
instructions
are
shipped
with
your
product
and
are
available
from
Lenovo
at
any
time
upon
request.
You
can
find
a
list
of
CRUs
for
your
product
in
this
Hardware
Maintenance
Manual
.
You
might
be
required
to
return
the
defective
CRU.
When
return
is
required:(1)
return
instructions,
a
prepaid
shipping
label,
and
a
container
will
be
included
with
the
replacement
CRU;
and
(2)
you
might
be
charged
for
the
replacement
CRU
if
Lenovo
does
not
receive
the
defective
part
within
thirty
(30)
days
of
your
receipt
of
the
replacement
CRU.
See
your
Lenovo
Limited
Warranty
documentation
for
full
details.
General guidelines
When removing or replacing a FRU, be sure to observe the following general guidelines:
1. Do not try to service any computer unless you have been trained and certified. An untrained person runs
the risk of damaging parts.
2. Before replacing any FRU, review Chapter 8 “FRU replacement notices” on page 55.
3. Begin by removing any FRUs that have to be removed before replacing the failing FRU. Any such FRUs
are listed at the beginning of each FRU replacement section. Remove them in the order in which they
are listed.
4. Follow the correct sequence in the steps for removing a FRU, as given in the illustrations by the
numbers in square callouts.
5. When turning a screw, turn it in the direction as given by the arrow in the illustration.
6. When removing a FRU, move it in the direction as given by the arrow in the illustration.
7. To put the new FRU in place, reverse the removal procedure and follow any notes that pertain to
replacement.
8. When replacing a FRU, use the correct screws as shown in the replacement procedures.
DANGER
Before removing any FRU, turn off the computer, unplug all power cords from electrical outlets,
disable the built-in battery, and then disconnect any interconnecting cables.
Attention:
After replacing a FRU, do not turn on the computer until you have made sure that all screws,
springs, and other small parts are in place and none are loose inside the computer. Verify this by shaking
the computer gently and listening for rattling sounds. Metallic parts or metal flakes can cause electrical
short circuits.
Attention:
The system board is sensitive to, and can be damaged by, electrostatic discharge (ESD).
Before touching it, establish personal grounding by touching a ground point with one hand or by using an
electrostatic discharge strap.
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