40
Lenovo N22 Hardware Maintenance Manual
1050 System board
Important notices for handling the system board:
When handling the system board, bear the following in mind.
• Be careful not to drop the system board on a bench top that has a hard surface,
such as metal, wood, or composite.
• Avoid rough handling of any kind.
• During the whole process, make sure not to drop or stack the system board.
• If you put a system board down, make sure to put it only on a padded surface,
such as an ESD mat or conductive corrugated material.
For access, remove these FRUs in order:
• “1010 Base cover” on page 33
• “1020 Battery pack” on page 35
• “1030 PCI Express Mini Card for wireless LAN” on page 36
• “1040 LCD unit” on page 38
Figure 5. Removal steps of system board
Remove screws
1
. Unplug speaker connector and backup battery connector
in the direction shown by arrow
2
. Detach keyboard connector, touch pad
connector and IO board connector in the directions shown by arrows
3
and
4
.
a
a
a
a
a
Step Screw (quantity)
Color Torque
1
M2.5 × 3 mm, flat-head,
nylok-coated (5) MB to Upper
Black
2 kgf.cm