1100 System Board - Lenovo ThinkPad X240 Hardware Maintenance Manual

Removal steps of the dc-in cable assembly
Step Screw (quantity)
1
M2 × 4 mm, flat-head, nylon-coated (1)

1100 System board

Important notices for handling the system board
When handling the system board, observe the following:
• The system board has an accelerometer, which can be broken when several thousands of G-forces
are applied.
Note: Dropping a system board from a height of as little as 15 cm (6 inches) so that it falls flat on a hard
bench can subject the accelerometer to as much as 6000 G's of shock.
• 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.
• At every point in the process, be sure not to drop or stack the system board.
• If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a
corrugated conductive material.
For access, remove the following FRUs in order:
• "1010 External battery pack" on page 59
• "1020 Base cover assembly" on page 59
• "1030 Internal battery pack" on page 60
• "1040 Memory module" on page 62
• "1060 Wireless-LAN card" on page 65
• "1070 Wireless-WAN card or M.2 solid-state drive" on page 66
• "1080 Fan assembly" on page 67
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Hardware Maintenance Manual
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Color Torque
Black 0.181 Nm
(1.85 kgf-cm)