HP 4340S manual Heat sink

4.Lift the right side of the system board up at an angle (2), and then lift the system board up and to the right to remove it (3).

Reverse this procedure to install the system board.

Heat sink

NOTE: The fan and heat sink are combined into one assembly. All fan/heat sink spare part kits contain replacement thermal material.

Description	Spare part number
Heat sink for use in computers with discrete graphics	683860-001
Heat sink for use in computers with UMA graphics	683861-001

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 31).

5.Remove the following components:

a.Bottom door (see Bottom door on page 33).

b.Hard drive (see Hard drive on page 37)

c.Optical drive (see Optical drive on page 35)

d.WLAN module (see WLAN/Bluetooth combo card on page 43)

Component replacement procedures 63