Lenovo ThinkPad L421 Hardware Maintenance Manual - Page 74

Do not touch or apply any excessive force to the fan motor. It might cause damage to the fan assembly or

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Attention: • Do not handle the fan roughly. Improper handling of the fan can cause distortion or deformation and imperfect contact with components. • Do not touch or apply any excessive force to the fan motor. It might cause damage to the fan assembly or might cause the computer to malfunction. Table 8. Removal steps of fan assembly 1 When installing: Make sure that the fan connector is attached firmly to the system board. Note: Loosen the screws 2a to 2d in order, but do not remove them. When you attach the fan, secure the screws in order. 2a 2d 2c 2b Note: Different models might have different numbers of screws in step 2 . 68 Hardware Maintenance Manual

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Attention:
•
Do not handle the fan roughly. Improper handling of the fan can cause distortion or deformation and
imperfect contact with components.
•
Do not touch or apply any excessive force to the fan motor. It might cause damage to the fan assembly or
might cause the computer to malfunction.
Table 8. Removal steps of fan assembly
1
When installing:
Make sure that the fan connector is attached firmly to the system board.
Note:
Loosen the screws
2a
to
2d
in order, but do not remove them. When you attach the fan, secure the screws in
order.
2c
2b
2d
2a
Note:
Different models might have different numbers of screws in step
2
.
68
Hardware Maintenance Manual