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3. Lift the system board (4), and then remove it (5).

Reverse this procedure to install the system board.

Fan and heat sink assembly

Description Spare part number

Fan and heat sink assembly

For 14" products with integrated graphics 840662-001

For 14" products with discrete graphics 840663-001

For 15" products with integrated graphics 840732-001

For 15" products with high-quality integrated graphics 840734-001

For 15" products with discrete graphics 840733-001

IMPORTANT: Make special note of each screw and screw lock size and location during removal and

replacement

Before removing the fan and heat sink, follow these steps:

1. Shut down the computer.

2. Disconnect all external devices connected to the computer.

3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet and then

unplugging the AC adapter from the computer.

4. Remove the following components:

Component replacement procedures 61

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HP ProBook 640 G2 Specifications

General

Color	black
OS	windows 10 pro
Touch Screen	no
Screen Type	led
Screen Size	14 inches
Screen Resolution	1920 x 1080 (full hd)
Processor Brand	intel
Processor Model	intel 6th generation core i5
Processor Model Number	i5-6300u
Storage Type	ssd
Storage Capacity	256 gigabytes
SSD Capacity	256 gigabytes
SSD Interface	pcie
Type of Memory	ddr4
System Memory	8 gigabytes
System Memory Speed	2133 megahertz
System Memory Expansion	32 gigabytes
Audio Type	hd audio with dts studio sound
Speakers Type	stereo
Backlit Keyboard	yes
Card Reader	yes
Security	cable lock slot, smartcard reader
Touchpad	with multi-touch gesture support and two-way scroll
Headphones Output	yes
Battery Type	prismatic lithium-ion