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System board assembly, fan assembly, and backup battery - ThinkPad Edge E120, E125

System board assembly, fan assembly, and backup battery removal and installation

 

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.

  • 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.

After replacing the system board, run PC-Doctor for DOS to make sure that the HDD Active Protection System still functions. The procedure is as follows:

  1. Place the computer on a horizontal surface.
  2. Run Diagnostics -> ThinkPad Devices -> HDD Active Protection Test.

Attention: Do not apply physical shock to the computer while the test is running.

For access, remove these FRUs in order:

Please perform the following steps as shown in the pictures below.

Step Screw (quantity) Color Torque
1 M2 × 3 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm)

 

When installing: Make sure that the connectors are attached firmly to the system board.

When installing: Make sure that the connector is attached firmly.

 

Loosen the screws [10] .

DANGER

Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode.


When installing: Make sure that the connector is attached firmly.


Purchase parts online

 


  • Alias ID:
  • Document ID: PD015180
  • Last Updated :6/17/2014
  • (c) 2014 Lenovo