Lenovo ThinkPad Edge E431 Hardware Maintenance Manual - Page 93

System board assembly, Removal steps of the microprocessor, When installing

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Removal steps of the microprocessor Rotate the head of the screw in the direction shown by the arrow 1 to release the lock; then remove the microprocessor 2 . 2 1 3 When installing: Place the microprocessor above the microprocessor socket, and then rotate the head of the screw in the direction shown by the arrow 3 to secure the microprocessor. 1150 System board assembly Important notices for handling the system board: When handling the system board, read 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 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 surface. For access, remove these FRUs in order: • "1020 Battery pack" on page 65 • "1030 Large bottom cover" on page 66 • "1040 Small bottom cover" on page 67 Chapter 9. Removing or replacing a FRU 87

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Removal steps of the microprocessor
Rotate the head of the screw in the direction shown by the arrow
1
to release the lock; then remove the
microprocessor
2
.
1
3
2
When installing:
Place the microprocessor above the microprocessor socket, and then rotate the head of
the screw in the direction shown by the arrow
3
to secure the microprocessor.
1150 System board assembly
Important notices for handling the system board:
When handling the system board, read 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 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 surface.
For access, remove these FRUs in order:
•
“1020 Battery pack” on page 65
•
“1030 Large bottom cover” on page 66
•
“1040 Small bottom cover” on page 67
Chapter 9
.
Removing or replacing a FRU
87