Lenovo B40-70 Hardware Maintenance Manual - Lenovo B40-xx Notebook - Page 36

Removing and replacing an FRU, Attention, DANGER - review

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Lenovo B40-30/B40-45/ B40-70 Hardware Maintenance Manual Removing and replacing an FRU This section presents exploded figures with the instructions to indicate how to remove and replace the FRU. Make sure to observe the following general rules: 1. Do not attempt 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 "FRU replacement notices" on page 31. 3. Begin by removing any FRUs that have to be removed before the failing FRU. Any of such FRUs are listed at the top of the page. Remove them in the order in which they are listed. 4. Follow the correct sequence in the steps to remove the FRU, as given in the figures by the numbers in square callouts. 5. When turning a screw to replace an FRU, turn it in the direction as given by the arrow in the figure. 6. When removing the FRU, move it in the direction as given by the arrow in the figure. 7. To put the new FRU in place, reverse the removal procedures and follow any of the notes that pertain to replacement. For information about connecting and arranging internal cables, see "Locations" on page 62. 8. When replacing an FRU, use the correct screw as shown in the procedures. DANGER Before removing any FRU, turn off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any of the interconnecting cables. Attention: After replacing an 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. Before touching it, establish personal grounding by touching a ground point with one hand or using an electrostatic discharge (ESD) strap  (P/N 6405959) to remove potential shock reasons. Note: The illustrations used in this section are of the Lenovo B40‐70, unless otherwise stated. 32

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Lenovo B40-30/B40-45/ B40-70
Hardware Maintenance Manual
32
This
 
section
 
presents
 
exploded
 
figures
 
with
 
the
 
instructions
 
to
 
indicate
 
how
 
to
 
remove
 
and
 
replace
 
the
 
FRU.
 
Make
 
sure
 
to
 
observe
 
the
 
following
 
general
 
rules:
1.
Do
 
not
 
attempt
 
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
 
“FRU
 
replacement
 
notices”
 
on
 
page
 
31.
3.
Begin
 
by
 
removing
 
any
 
FRUs
 
that
 
have
 
to
 
be
 
removed
 
before
 
the
 
failing
 
FRU.
 
Any
 
of
 
such
 
FRUs
 
are
 
listed
 
at
 
the
 
top
 
of
 
the
 
page.
 
Remove
 
them
 
in
 
the
 
order
 
in
 
which
 
they
 
are
 
listed.
4.
Follow
 
the
 
correct
 
sequence
 
in
 
the
 
steps
 
to
 
remove
 
the
 
FRU,
 
as
 
given
 
in
 
the
 
figures
 
by
 
the
 
numbers
 
in
 
square
 
callouts.
5.
When
 
turning
 
a
 
screw
 
to
 
replace
 
an
 
FRU,
 
turn
 
it
 
in
 
the
 
direction
 
as
 
given
 
by
 
the
 
arrow
 
in
 
the
 
figure.
6.
When
 
removing
 
the
 
FRU,
 
move
 
it
 
in
 
the
 
direction
 
as
 
given
 
by
 
the
 
arrow
 
in
 
the
 
figure.
7.
To
 
put
 
the
 
new
 
FRU
 
in
 
place,
 
reverse
 
the
 
removal
 
procedures
 
and
 
follow
 
any
 
of
 
the
 
notes
 
that
 
pertain
 
to
 
replacement.
 
For
 
information
 
about
 
connecting
 
and
 
arranging
 
internal
 
cables,
 
see
 
“Locations”
 
on
 
page
 
62.
8.
When
 
replacing
 
an
 
FRU,
 
use
 
the
 
correct
 
screw
 
as
 
shown
 
in
 
the
 
procedures.
Attention:
 
After
 
replacing
 
an
 
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.
 
Before
 
touching
 
it,
 
establish
 
personal
 
grounding
 
by
 
touching
 
a
 
ground
 
point
 
with
 
one
 
hand
 
or
 
using
 
an
 
electrostatic
 
discharge
 
(ESD)
 
strap
 
(P/N
 
6405959)
 
to
 
remove
 
potential
 
shock
 
reasons.
Note:
 
The
 
illustrations
 
used
 
in
 
this
 
section
 
are
 
of
 
the
 
Lenovo
 
B40
‐
70,
 
unless
 
otherwise
 
stated.
Removing and replacing an FRU
DANGER
Before
 
removing
 
any
 
FRU,
 
turn
 
off
 
the
 
computer,
 
unplug
 
all
 
power
 
cords
 
from
 
electrical
 
outlets,
 
remove
 
the
 
battery
 
pack,
 
and
 
then
 
disconnect
 
any
 
of
 
the
 
interconnecting
 
cables.