1120 System Board, Fan Assembly, And Backup Battery - Lenovo ThinkPad Edge 11 Hardware Maintenance Manual

Table 18. Removal steps of speaker assembly
Step Screw (quantity)
2
M2 × 4 mm, wafer-head, nylon-coated (2)
When installing:
Make sure that the connector is attached firmly.

1120 System board, fan assembly, and backup battery

Important notices for handling the system board:
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 6 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 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
conductive corrugated material.
Note: The fan assembly and the backup battery are attached to the system board.
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Hardware Maintenance Manual
Color Torque
0.181 Nm
Silver
(1.85 kgfcm)