Lenovo THINKPAD T41/T41P Bedienungsanleitung PDF herunterladen (Seite 76)

Removing and replacing a FRU

This section presents directions and drawings for use in

removing and replacing a FRU. Be sure to observe the

following general rules:

1. Do not try to service any computer unless you have

been trained and certified. An untrained person runs

the risk of damaging parts.

2. Before replacing any FRU, review “FRU replacement

notices” on page 66.

3. Begin by removing any FRUs that have to be removed

before the failing FRU. Any such FRUs are listed at the

top of the page. Remove them in the order in which

they are listed.

4. Follow the correct sequence in the steps for removing

the FRU, as given in the drawings by the numbers in

square callouts.

5. When turning a screw to replace a FRU, turn it in the

direction as given by the arrow in the drawing.

6. When removing the FRU, move it in the direction as

given by the arrow in the drawing.

7. To put the new FRU in place, reverse the removal

procedure and follow any notes that pertain to

replacement. For information about connecting and

arranging internal cables, see “Locations” on page 186.

8. When replacing a FRU, use the correct screw as

shown in the procedures.

DANGER

Attention: After replacing a FRU, do not turn on the

computer until you have made sure that all screws,

springs, and other small parts are in place and none are

loose inside the computer. Verify this by shaking the

computer gently and listening for rattling sounds. Metallic

parts or metal flakes can cause electrical short circuits.

Attention: The system board is sensitive to, and can be

damaged by, electrostatic discharge. Before touching it,

establish personal grounding by touching a ground point

with one hand or by using an electrostatic discharge (ESD)

strap (P/N 6405959).

Before

removing any FRU, turn off the computer,

unplug all power cords from electrical outlets,

remove the battery pack, and then disconnect any

interconnecting cables.

Removing and replacing a FRU

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