1120 System Board Assembly And Thermal Fan Assembly - Lenovo ThinkPad X131e Chromebook Hardware Maintenance Manual

Removal steps of CRT board assembly
Step Screw (quantity)
3
M2 × 3 mm, wafer-head, nylon-coated (2)
When installing: Ensure that the connector is attached firmly to the system board.

1120 System board assembly and thermal fan assembly

Important notices for handling the system board:
Some components mounted on a system board are very sensitive. Improper handling of a system board can cause
damage to those components, and might cause a system malfunction. When handling the system board, bear the
following in mind:
• The system board has an accelerometer, which can be broken by applying several thousands of G-forces.
Note: Dropping a system board from a height of as little as six inches so that it falls flat on a hard bench can subject
the accelerometer to as much as 6,000 G's of shock.
• Be careful not drop a system board or apply any excessive force to it.
• If a system board is dropped, be sure to document the drop in any reject report, and replace the system board.
• Avoid rough handling of any kind.
• Avoid bending a system board and hard pushing to prevent cracking at each BGA (Ball Grid Array) chipset.
• 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 conductive
corrugated material.
For access, remove these FRUs in order:
• "1010 Battery pack" on page 28
• "1020 Bottom slot cover" on page 29
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Hardware Maintenance Manual
Torque
Color
Black 0.181 Nm
(1.85 kgf-cm)