HP DV4 manual Heat sink assembly

		Removal and replacement procedures
Heat sink assembly
	Description	Spare part number
	System board (includes replacement thermal material)
	UMA graphics subsystems	591957-001
	Discrete graphics subsystems	591956-001

Before removing the heat sink assembly:

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 disconnecting the power cord from the AC outlet and then disconnecting the AC adapter from the computer.

4.Remove the battery (see “Battery” on page 4-7).

5.Remove the following components:

a.Hard Drive (see “Hard Drive” on page 4-8)

b.Memory module (see “Memory module” on page 4-10)

c.Mini Card compartment cover (see “RTC battery” on page 4-12)

d.WLAN module (see “WLAN module” on page 4-15)

e.Optical drive (see “Optical drive” on page 4-19)

f.Keyboard (see “Keyboard” on page 4-20)

g.Keyboard cover (see “Keyboard cover” on page 4-23)

h.Speaker assembly (see “Speaker assembly” on page 4-26)

i.Display assembly (see “Display assembly” on page 4-27)

j.Top cover (see “Top cover” on page 4-34)

k.System board (see “System board” on page 4-50)

Maintenance and Service Guide 4–55