HP 4540s Spécifications télécharger pdf (Page 85)

Heat sink

All heat sink spare part kits include replacement thermal material.

Description Spare part number

For use in 4540s models:

Heat sink for use in models with UMA graphics and a removable processor 683489-001

Heat sink for use in models with discrete graphics and a removable processor 683490-001

Heat sink for use in models with UMA graphics and the processor soldered to the system board 712920-001

Heat sink for use in models with discrete graphics and the processor soldered to the system

board

712919-001

For use in 4440s/4441s models:

Heat sink for use in models with discrete graphics and a removable processor 683655-001

Heat sink for use in models with UMA graphics and a removable processor 683656-001

Heat sink for use in models with discrete graphics and the processor soldered to the system

board

713376-001

Heat sink for use in models with UMA graphics and the processor soldered to the system board 713377-001

Before removing the heat sink, 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)

d. Fan (see

Fan on page 75)

Remove the heat sink:

1. Position the computer upside-down.

2. To remove the discrete heat sink, in the order indicated, loosen the six captive Phillips screws

(1) that secure the heat sink to the system board.

Component replacement procedures 77

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HP 4540s Spécifications Page 85