HP ProBook 4420s User Manual

Heat sink and fan
NOTE: The heat sink spare part kit includes replacement thermal material.
Description Spare part number
Fan 599544-001
Processor heat sink
For use with discrete graphics subsystems 599653-001
For use with Unified Memory Architecture (UMA) graphics subsystems 599546-001
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 56).
5. Remove the following components:
a. Switch cover (see
Switch cover on page 58)
b. Keyboard (see
Keyboard on page 60)
c. Palm rest (see
Palm rest on page 71)
Remove the heat sink:
1. Position the computer right-side up with the front toward you.
2. Remove the six Phillips PM2.5×3.0 screws (1) that secure the heat shield to the top cover.
3. Remove the Phillips PM2.5×5.0 screw (2) that secures the heat shield to the top cover.
82 Chapter 4 Removal and replacement procedures

HP ProBook 4420s Specifications

General

Bus type	DMI
Stepping	K0
Tjunction	105 °C
Processor cache	3 MB
Processor cores	2
Processor model	i5-580M
System bus rate	2.5 GT/s
Processor family	Intel® Core™ i5
Processor series	Intel Core i5-500 Mobile Series
Processor socket	BGA 1288
Processor threads	4
Processor codename	Arrandale
Processing Die size	81 mm²
Processor frequency	2.66 GHz
Processor cache type	Smart Cache
Processor lithography	32 nm
Processor manufacturer	Intel
PCI Express slots version	2.0
Processor boost frequency	3.33 GHz
Processor operating modes	64-bit
ECC supported by processor	No
PCI Express configurations	1x16
Thermal Design Power (TDP)	35 W
CPU multiplier (bus/core ratio)	20
Maximum number of PCI Express lanes	16
Number of Processing Die Transistors	382 M
Motherboard chipset	Intel® HM57 Express
HDD speed	7200 RPM
HDD interface	SATA
Optical drive type	DVD Super Multi DL
Card reader integrated	Yes
Total storage capacity	500 GB
Number of HDDs installed	1
Display diagonal	14 \
Display resolution	1366 x 768 pixels
Native aspect ratio	16:9
Power supply type	AC/DC
Intel segment tagging	Enterprise
Compliance industry standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Memory slots	2x SO-DIMM
Internal memory	4 GB
Memory clock speed	1333 MHz
Internal memory type	DDR3-SDRAM
Maximum internal memory	- GB
Bluetooth version	2.0+EDR
Cabling technology	10/100/1000Base-T(X)
Networking features	Gigabit Ethernet
Operating system installed	Windows 7 Professional
Charging port type	DC-in jack
USB 2.0 ports quantity	3
Firewire (IEEE 1394) ports	0
Cable lock slot type	Kensington
AC adapter power	65 W
Battery capacity	47 Wh
Number of battery cells	6
Product color	Black
Country of origin	China
Pointing device	Touchpad
Discrete graphics card model	Intel® HD Graphics
On-board graphics card base frequency	500 MHz
On-board graphics card dynamic frequency (max)	766 MHz
Processor code	SLC29
Processor ARK ID	49652
Processor package size	rPGA 37.5x 37.5, BGA 34x28 mm
Graphics & IMC lithography	45 nm
Supported instruction sets	SSE4.1/4.2
Intel® Turbo Boost Technology	1.0
Physical Address Extension (PAE)	36 bit

Weight and Dimensions

Depth	232 mm
Width	336 mm
Height	27 mm
Weight	2140 g