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Lenovo ideapad 720S-15IKB/Lenovo ideapad 720S Touch-15IKB
1110 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.
• In 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 32
• “1020 Battery pack” on page 34
• “1030 Speaker” on page 35
• “1060 PCI Express Mini Card for wireless LAN” on page 38
• “1070 Fan and heat sink assembly” on page 40
• “1080 IO board” on page 42
• “1090 Audio board” on page 44
• “1100 Fingerprint module” on page 45
Figure 11. Removal steps of system board
Detach the six connectors (touchpad connector, KB FPC connector, KB back
light connector, DC-in cable connector, EDP cable connector and Touch panel
cable connector) in the directions shown by arrows
1
,
2
and
3
. Remove the
screws
4
and
5
.
5 5
5
4
4
4
2
1
1
1
2
2
3
3
Step Screw (quantity)
Color Torque
4
M2 × 2.5 mm, Phillips head, nylok-coated (3)
MB
Silver
1.0~1.5 kgf*cm
5
M2.5 × 4 mm, Phillips head, nylok-coated (3)
MB
Silver
1.5~2.0 kgf*cm
When installing:
Make sure that the connectors are attached firmly.
