Lenovo 059624U User Manual - Page 77
System board, fan assembly, and backup battery, Important notices for handling the system board
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Table 21. Removal steps of I/O board 2 3 1 Step 1 Screw (quantity) M2 × 4 mm, wafer-head, nylon-coated (1) When installing: Make sure that the connector is attached firmly. Color Silver Torque 0.181 Nm (1.85 kgfcm) 1130 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. Chapter 8. Removing and replacing a FRU 71