Lenovo B40-70 Laptop Hardware Maintenance Manual - Lenovo B40-xx Notebook - Page 53
Removal, steps, system, board, continued, 0~2.5kgf.cm
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Lenovo B40-30/B40-45/B40-70 Figure 11. Removal steps of system board (continued) Disconnect the USB board connector in the direction shown by arrow b . Then disconnect the EDP connector in the direction shown by arrow c . 3 2 Remove the screw d . Pull the DC‐IN connect from its cavity in the direction by arrow e . Then remove the system board in the direction by arrow f . 5 4 6 Step Screw (quantity) Color Torque d 7 M2.5 x 4 mm, flat‐head, nylok‐coated (1) Black 2.0~2.5kgf.cm When installing: • Make sure USB, HDMI, and the VGA of the system board attached into its holes on the base properly. Improper placement of the jacks may cause damage. • Make sure that the connectors are attached firmly to the system board. 49
Lenovo B40-30/B40-45/B40-70
49
Figure
11.
Removal
steps
of
system
board
(continued)
Disconnect
the
USB
board
connector
in
the
direction
shown
by
arrow
.
Then
disconnect
the
EDP
connector
in
the
direction
shown
by
arrow
.
Remove
the
screw
Pull
the
DC
‐
IN
connect
from
its
cavity
in
the
direction
by
arrow
.
Then
remove
the
system
board
in
the
direction
by
arrow
.
When installing:
•
Make
sure
USB,
HDMI,
and
the
VGA
of
the
system
board
attached
into
its
holes
on
the
base
properly.
Improper
placement
of
the
jacks
may
cause
damage.
•
Make
sure
that
the
connectors
are
attached
firmly
to
the
system
board.
Step
Screw (quantity)
Color
Torque
M2.5
x
4
mm,
flat
‐
head,
nylok
‐
coated
(1)
Black
2.0~2.5kgf.cm
b
c
2
3
d
e
f
4
5
6
d