HP 4540s Spécifications télécharger pdf (Page 83)

Fan

Description Spare part number

Fan for use in 4540s models 683484-001

Fan for use in 4440s/4441s models 683651-001

Before removing the fan, follow these steps:

1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn

the computer on, and then shut it down through the operating system.

2. Disconnect all external devices connected to the computer.

3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet,

and then unplugging the AC adapter from the computer.

4. Remove the battery (see

Battery on page 55).

5. Remove the following components:

a. Bottom door (see

Bottom door on page 58).

b. Keyboard (see

Keyboard on page 70)

c. Heat shield (see

Heat shield on page 73)

Remove the fan:

1. Position the computer upside-down.

2. Disconnect the fan cable (1) from the system board.

3. Remove the two Phillips PM2.5×5.0 screws (2) that secure the fan to the system board.

Component replacement procedures 75

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HP 4540s Spécifications Page 83