1130 System Board Assembly, Fan Assembly, And Backup Battery - Lenovo ThinkPad X121e Hardware Maintenance Manual

• "1010 Battery pack" on page 50
• "1020 Bottom slot cover" on page 51
• "1070 Keyboard" on page 57
• "1090 Top case assembly" on page 60
Removal steps of I/O board
Step Screw (quantity)
3
M2 × 3 mm, wafer-head, nylon-coated (1)
When installing: Make sure that the connector is attached firmly.

1130 System board assembly, 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 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 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.
• If a system board is dropped, you must test it, using PC-Doctor for DOS, to make sure that the HDD Active
Protection System™ still functions.
Note: If the test shows that the HDD Active Protection System is not functioning, be sure to document the drop
in any reject report, and replace the system board.
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Hardware Maintenance Manual
1
Torque
Color
Black 0.181 Nm
(1.85 kgfcm)