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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