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System board, fan assembly, and 34-mm ExpressCard slot frame removal and installation - ThinkPad T400s, T410s, T410si
System board removal

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.
  • If a system board is dropped, you must test it, using PC-Doctor for DOS, to make sure that the HDD Active Protection still functions (see below).
    Note: If the test shows that HDD Active Protection 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 conductive corrugated material.

After replacing the system board, run PC-Doctor for DOS to make sure that HDD Active Protection 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:

Following components soldered on the top side of the system board are extremely sensitive. When you service the system board, avoid any kind of rough handling.

a
ICH (I/O Controller Hub)
b
CPU
c
GMCH (Graphics Memory Controller Hub)
d
Accelerometer chip for the HDD Active Protection System™

Location of System board soldered components

System board removal steps 1 and 2.

Note: Step [2a] is only for ThinkPad T410s and T410si.

StepScrew (quantity)ColorTorque
1M2 x 3.5 mm, big-head, nylon-coated (3)Black0.181 Nm (1.85 kgfcm)
2M2 x 6 mm, bind-head, nylon-coated (1)Black0.181 Nm (1.85 kgfcm)
2aM2 × 6 mm, bind-head, nylon-coated (2)Black0.181 Nm (1.85 kgfcm)

In step [4], remove the system board and fan assembly together from the base cover assembly.

System board removal steps 3 and 4.

Fan assembly removal and installation

Note: The steps from [5] to [7] indicate the removal steps of fan assembly, and those from [8] to [11] indicate the ones of 34-mm ExpressCard slot frame.

Fan assembly removal step 5.

Note: Step [5a] is only for ThinkPad T410s and T410si.

StepScrew (quantity)ColorTorque
5M2 x 3.5 mm, big-head, nylon-coated (3)Black0.181 Nm (1.85 kgfcm)
5aM2 × 3.5 mm, big-head, nylon-coated (1)Black0.181 Nm (1.85 kgfcm)

Turn the system board over, and then disconnect the fan assembly from the system board.

Fan assembly removal steps 6 and 7.

When installing:

  • Before you attach the fan assembly to the computer, apply thermal grease, at an amount of 0.2 grams, on the part marked [a] as in the following figure. Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component. You need to peel the thin film off from the rubber [b].

    For ThinkPad T400s:

    Thermal grease applicaiton on fan assembly

 

For ThinkPad T410s and T410si:

72781_sys9.gif

  • Make sure that the fan connector is attached firmly.
34-mm ExpressCard slot frame removal

For ThinkPad T400s:

ExpressCard slot removal steps 8 and 9.

StepScrew (quantity)ColorTorque
8M2 x 3 mm, small-head, nylon-coated (1)Silver0.181 Nm (1.85 kgfcm)
9M2 x 5 mm, flat-head, nylon-coated (2)Black0.181 Nm (1.85 kgfcm)

 

For ThinkPad T410s and T410si:

72781_sys10.gif

StepScrew (quantity)ColorTorque
8M2 x 3 mm, small-head, nylon-coated (1)Silver0.181 Nm (1.85 kgfcm)
9M2 x 5 mm, flat-head, nylon-coated (2)Black0.181 Nm (1.85 kgfcm)

Turn the system board over, and then remove the 34-mm ExpressCard slot frame from the system board.

ExpressCard slot removal steps 10 and 11.

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Document ID : PD004954
Legacy Document ID : MIGR-72781
Last Updated :
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