HP DM3 manual Heat sink, 581187-001, 581186-001

Heat sink

NOTE: The processor is soldered onto the system board. Thermal grease has been applied between the heat sink and the processor, chipset, and graphics chipset.

Description	Spare part
	number
Heat sink for use only on computer models equipped with a graphics subsystem with discrete memory	581187-001
Heat sink for use only on computer models equipped with a graphics subsystem with UMA memory	581186-001

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 36).

5.Remove the following components:

a.Hard drive (see Hard drive on page 38)

b.Memory/wireless module compartment cover (see WLAN module on page 43

c.Keyboard (see Keyboard on page 50)

d.Display assembly (see Display assembly on page 57)

e.Top cover (see Top cover on page 53)

f.System board (see System board on page 67)

Remove the heat sink:

1.Loosen the four captive Phillips 2.0×8.0 screws 1 in the order sequence noted on the heat sink.

2.Remove the five Phillips 2.0×4.0 screws 2 holding the heat sink to the system board.

Component replacement procedures 73