1140 System Board Assembly - Lenovo ThinkPad Edge E545 Maintenance Manual

Removal steps of the microprocessor
Rotate the head of the screw in the direction shown by the arrow
microprocessor 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

1140 System board assembly

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 if 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.
• 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.
• 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:
• "1010 Battery pack" on page 62
1
to release the lock; then remove the
3
to secure the microprocessor.
Chapter 9
.
Removing or replacing a FRU
79