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Important

When handling the system board in ThinkPad T41

series, bear the following in mind.

v The system board of the ThinkPad T41 series

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.

v Be careful not to drop the system board on a

bench top that has a hard surface, such as metal,

wood, or composite.

v If a system board is dropped, you must test it,

using PC-Doctor DOS, to make sure that the IBM

HDD Active Protection still functions (see below).

Note: If the test shows that IBM HDD Active

Protection is not functioning, be sure to

document the drop in any reject report,

and replace the system board.

v Avoid rough handling of any kind.

v At every point in the process, be sure not to drop

or stack the system board.

v 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

DOS to make sure that IBM HDD Active Protection

still functions. The procedure is as follows:

1. Place the computer on a horizontal surface.

2. Run Diagnostics --> Other Devices --> IBM

HDD Active Protection Test.

Attention: Do not apply physical shock to the

computer while the test is running.

Removing and replacing a FRU

ThinkPad T40, T40p, T41 Series 111

Other manuals for IBM ThinkPad T40 series

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