HP ProBook 4520s, ProBook 4720s Maintenance and Service Guide

HP ProBook 4520s Notebook PC

HP ProBook 4720s Notebook PC

Maintenance and Service Guide

Bluetooth is a trademark owned by its proprietor and used by Hewlett-Packard Company under license. Intel, Core, and Celeron are trademarks of Intel Corporation in the United States and other countries. Microsoft, Windows, and Windows Vista are U.S. registered trademarks of Microsoft Corporation. SD Logo is a trademark of its proprietor.

The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

First Edition: March 2010

Document Part Number: 598082-001

Safety warning notice

WARNING! To reduce the possibility of heat-related injuries or of overheating the computer, do not place the computer directly on your lap or obstruct the computer air vents. Use the computer only on a hard, flat surface. Do not allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs or clothing, to block airflow. Also, do not allow the AC adapter to contact the skin or a soft surface, such as pillows or rugs or clothing, during operation. The computer and the AC adapter comply with the user-accessible surface temperature limits defined by the International Standard for Safety of Information Technology Equipment (IEC 60950).

iii

iv Safety warning notice

Table of contents

1	Product description ...........................................................................................................	1
2	External component identification .....................................................................................	9
	Top Components ......................................................................................................................	9
	TouchPad .................................................................................................................	9
	Lights .....................................................................................................................	11
	Buttons, switches, and speakers (select models only) ....................................................	12
	Keys ......................................................................................................................	13
	Front components ...................................................................................................................	14
	Right-side components ............................................................................................................	14
	Left-side components ...............................................................................................................	16
	Bottom components ................................................................................................................	17
	Display .................................................................................................................................	17
	Wireless antennas ..................................................................................................................	19
	Additional hardware components ............................................................................................	20
3	Illustrated parts catalog ..................................................................................................	21
	Service tag ............................................................................................................................	21
	Computer major components ...................................................................................................	22
	Display assembly components .................................................................................................	28
	Plastics Kit .............................................................................................................................	29
	Cable Kits .............................................................................................................................	30
	Mass storage devices .............................................................................................................	32
	Miscellaneous parts ................................................................................................................	33
	Sequential part number listing ..................................................................................................	35
4	Removal and replacement procedures ............................................................................	43
	Preliminary replacement requirements .......................................................................................	43
	Tools required .........................................................................................................	43
	Service considerations .............................................................................................	43
	Plastic parts .............................................................................................	43
	Cables and connectors .............................................................................	44
	Drive handling .........................................................................................	44

v

Grounding guidelines ..............................................................................................	45
Electrostatic discharge damage ..................................................................	45
Packaging and transporting guidelines ........................................	46
Workstation guidelines ..............................................................	46
Equipment guidelines .................................................................	47
Component replacement procedures ........................................................................................	48
Service tag .............................................................................................................	48
Computer feet .........................................................................................................	49
Battery ...................................................................................................................	50
Switch cover and keyboard ......................................................................................	51
Memory module ......................................................................................................	55
Optical drive ..........................................................................................................	56
Power button board .................................................................................................	58
Speakers ................................................................................................................	60
Thermal shield ........................................................................................................	62
WLAN module ........................................................................................................	65
WWAN module .....................................................................................................	68
Heat sink and fan ....................................................................................................	69
Processor ...............................................................................................................	74
Palm rest ................................................................................................................	76
Hard drive .............................................................................................................	78
Display assembly on computers with 17.3-in displays ..................................................	80
Display assembly on computers with 15.6-in displays ..................................................	86
Top cover ...............................................................................................................	92
RTC battery ............................................................................................................	96
Bluetooth module ....................................................................................................	98
Modem module ......................................................................................................	99
Audio board .........................................................................................................	101
System board .......................................................................................................	103
USB connector assembly ........................................................................................	106
RJ-11 connector assembly ......................................................................................	107
Power connector assembly .....................................................................................	109
5 Computer Setup ............................................................................................................	111
Computer Setup ...................................................................................................................	111
Starting Computer Setup ........................................................................................	111
Using Computer Setup ...........................................................................................	111
Navigating and selecting in Computer Setup .............................................	111
Restoring factory settings in Computer Setup ..............................................	112
Computer Setup menus ..........................................................................................	113
File menu ..............................................................................................	113
Security menu ........................................................................................	115
System Configuration menu .....................................................................	116

vi

6	Specifications ................................................................................................................	121
	Computer specifications ........................................................................................................	121
	17.3-in display specifications ................................................................................................	122
	15.6-in display specifications ................................................................................................	123
	Hard drive specifications ......................................................................................................	124
	DVD-ROM Drive specifications ...............................................................................................	125
	DVD±RW Double-Layer Combo Drive specifications .................................................................	126
	Blu-ray Disc ROM Drive with SuperMulti DVD±R/RW Double-Layer specifications ........................	127
7 Backup and recovery ....................................................................................................		128
	Backup and recovery in Windows 7 .......................................................................................	128
	Overview .............................................................................................................	128
	Backing up your information ...................................................................................	128
	Performing a recovery ...........................................................................................	130
	Using the Windows recovery tools ..........................................................................	130
	Using f11 .............................................................................................................	131
	Using a Windows 7 operating system DVD (purchased separately) .............................	131
	Backup and recovery in Windows Vista ..................................................................................	132
	Overview .............................................................................................................	132
	Backing up your information ...................................................................................	132
	Performing a recovery ...........................................................................................	133
	Using the Windows recovery tools ..........................................................................	134
	Using f11 .............................................................................................................	134
	Using a Windows Vista operating system DVD (purchased separately) ........................	135
	Backup and recovery in Windows XP .....................................................................................	136
	Overview .............................................................................................................	136
	Backing up your information ...................................................................................	136
	Performing a recovery ...........................................................................................	137
	Recovering your information ....................................................................	137
	Recovering the operating system and programs .........................................	137
8	Connector pin assignments ...........................................................................................	139
	Audio-in (microphone) ..........................................................................................................	139
	Audio-out (headphone) .........................................................................................................	139
	External monitor ...................................................................................................................	140
	HDMI .................................................................................................................................	141
	RJ-11 (modem) .....................................................................................................................	142
	RJ-45 (network) ....................................................................................................................	143
	Universal Serial Bus ..............................................................................................................	143
9	Power cord set requirements ........................................................................................	144
	Requirements for all countries and regions ...............................................................................	144
	Requirements for specific countries and regions .......................................................................	145

vii

10 Recycling ....................................................................................................................	146
Battery ................................................................................................................................	146
Display ...............................................................................................................................	146
Index ...............................................................................................................................	152

viii

1 Product description

Category	Description	HP ProBook	HP ProBook	HP ProBook
		4520s UMA	4520s	4720s
			discrete	discrete
Product Name	HP ProBook 4520s Notebook PC	•	•
	HP ProBook 4720s Notebook PC			•
Processors	Intel® Core™ processors
	● i7-620M, 2.26-GHz (Turbo up to 3.33	•	•	•
	GHz), 4MB L3 cache
	● i5-540M, 2.53-GHz (Turbo up to 3.06	•	•	•
	GHz), 3MB L3 cache
	● i5-520M, 2.4-GHz (Turbo up to 2.93	•	•	•
	GHz), 3MB L3 cache
	● Core i5-430M, 2.26-GHz (Turbo up to	•	•	•
	2.53 GHz), 3MB L3 cache (select
	models ony)
	● Core i3-350M, 2.26-GHz, 3MB L3	•	•	•
	cache (select models only)
	● Core i3-330M, 2.13-GHz, 3MB L3	•	•	•
	cache (select models only)
Chipsets	Intel® HM57 Express	•	•	•
Graphics	Intel HD Graphics	•
	Intel Universal Memory Architecture (UMA)
	graphics subsystem integrated with shared
	video memory (dynamically allocated)
	ATI Mobility Radeon HD 4350 with 512-MB		•	•
	memory
Panels	All display assemblies support privacy filter	•	•	•

1

Category	Description	HP ProBook	HP ProBook	HP ProBook
		4520s UMA	4520s	4720s
			discrete	discrete
	15.6-in HD LED backlight panel:	•	•

●1366×768 AntiGlare

●1366×768 AntiGlare for webcam

●1366×768 AntiGlare for webcam and WWAN

●1366×768 BrightView

●1366×768 BrightView for webcam

●1366×768 BrightView for webcam and WWAN

17.3-in HD LED backlight panel:

•

●1600×900 AntiGlare

●1600×900 AntiGlare for webcam and WWAN

●1600×900 BrightView for webcam

●1600×900 BrightView for webcam and WWAN

Memory	2 customer-accessible/upgradable memory	•	•	•
	module slots
	Supports dual-channel memory	•	•	•
	Supports up to 4 GB of system RAM	•	•	•
	PC3-10600, 1333-MHz, DDR3	•	•	•
	Supports the following configurations in all	•	•	•
	countries and regions:
	● 4096-MB total system memory (4096-
	MB × 1)
	● 4096-MB total system memory (2048-
	MB × 2, dual-channel)
	● 3072-MB total system memory (2048-
	MB + 1024-MB, dual-channel)
	● 2048-MB total system memory (2048-
	MB × 1)
	● 2048-MB total system memory (1024-
	MB × 2, dual-channel)
	● 1024-MB total system memory (1024-
	MB × 1)

2	Chapter 1 Product description

Category	Description		HP ProBook	HP ProBook	HP ProBook
			4520s UMA	4520s	4720s
				discrete	discrete
Hard drives	Supports 9.5-mm, 6.35-cm (2.50-in) hard		•	•	•
	drives
	Customer-accessible		•	•	•
	Serial ATA		•	•	•
	Supports the following drives:		•	•	•
	●	500-GB, 7200-rpm
	●	320-GB, 7200-rpm
	●	250-GB, 7200-rpm
	HP 3D DriveGuard (not available on Linux)		•	•	•
Optical drives	Fixed, no modular requirements		•	•	•
	SATA 12.7-mm tray load		•	•	•
	Supports option of no optical drive		•	•	•
	Supports the following drives:		•	•	•

●DVD-ROM Drive

●DVD±RW SuperMulti Double-Layer Combo Drive with Lightscribe

●Blu-ray ROM DVD±RW SuperMulti DL Drive (not available with UMA base unit and Windows XP)

Diskette drive	Supports external USB diskette drive only	•	•	•
Audio/visual	IDT 92HD80	•	•	•
	Integrated microphone	•	•	•
	Stereo speakers (2)	•	•	•
	Integrated 2MP camera with fixed focus	•	•	•
	(select models only)
Modem	High-speed 56K modem for all regions and	•	•	•
	countries except APJ
	High-speed 56K modem APJ only	•	•	•
	Modem cable not included	•	•	•
	Supports no modem option	•	•	•
Ethernet	10/100/1000 Ethernet network interface	•	•	•
	card (NIC)
	S3/S4/S5 wake on LAN: AC only mode	•	•	•
Wireless	Integrated WLAN options by way of MiniPCI card:

3

Category	Description	HP ProBook	HP ProBook	HP ProBook
		4520s UMA	4520s	4720s
			discrete	discrete
	2 WLAN antennas built into display assembly	•	•	•
	Supports option for no-WLAN	•	•	•
	Support for the following WLAN formats:	•	•	•
	● Broadcom 802.11b/g
	● Atheros 802.11 b/g/n (1 x 1)
	● Realtek 802.11 b/g/n (1 x 2)
	● Intel 802.11 b/g 1S/2R Russia only
	● Intel 802.11 b/g/n 1S/2R
	● Intel 802.11 a/b/g 1S/2R
	● Intel 802.11 a/b/g/n 2S/2R

Integrated personal area network (PAN) options by way of Bluetooth® module:

Support option for no-WPAN	•	•	•
Bluetooth 2.1	•	•	•

Integrated WWAN options by way of HP Mobile Broadband Module:

	Supports only HP certified WWAN options	•	•
	WWAN module UNDP Gobi2 including GPS	•
	with 2 antennas (not available with Linux or
	Celeron)
	Dual WWAN antennas (world wide 5 band)	•	•
	SIM module (user accessible behind battery)	•	•
External media	One ExpressCard/33-mm	•	•	•
cards
	Media Card Reader supporting Memory Stick	•	•	•
	(MS), Memory Stick Pro (MSP), Secure Digital
	(SD) Memory Card, Secure Digital High
	Capacity (SDHC) Memory Card,
	MultiMediaCard (MMC), and xD-Picture Card
	formats
Ports	Audio-in (stereo microphone)	•	•	•
	Audio-out (stereo headphone)	•	•	•
	RJ-11 (modem)	•	•	•
	RJ-45 (Ethernet, includes link and activity	•	•	•
	lights)
	USB 2.0 (3)	•	•	•
	Combination eSATA/USB 2.0 (1)	•	•	•

4	Chapter 1 Product description

Category	Description	HP ProBook	HP ProBook	HP ProBook
		4520s UMA	4520s	4720s
			discrete	discrete
	VGA (Dsub 15-pin) supporting 1600 × 1200	•	•	•
	external resolution at 75-GHz (hot plug/
	unplug with auto-detect)
	Multi-pin AC power	•	•	•
	HDMI	•	•	•
Keyboard/	15.6-in keyboard with integrated number pad	•	•
pointing devices	and Clickpad
	17.3-in keyboard with integrated number pad			•
	and Clickpad
	Suports 2-way scroll with legend and gestures	•	•	•
	(taps enabled as default)
Power	65-W AC adapter with localized cable plug	•
requirements	support (3-wire plug with ground pin)
	90-W AC adapter with localized cable plug		•	•
	support (3-wire plug with ground pin)
	8-cell, 73-Wh Li-ion battery			•
Security	Supports Kensington security lock	•	•	•
Fingerprint reader	15.6-in Integrated fingerprint reader	•	•
	17.3-in Integrated fingerprint reader			•
	Supports no fingerprint reader option	•	•	•
Operating system	Preinstalled with Microsoft Office:	•	•	•
	Windows 7 Home Premium 32 with Office	•	•	•
	2007 Ready (excludes Japan)
	Windows 7 Home Premium 32 with Office	•	•	•
	2007 Personal (Japan only)
	Windows 7 Home Premium 32 with Office	•	•	•
	2007 Personal with PowerPoint (Japan only)
	Windows 7 Home Premium 32 with Office	•	•	•
	2007 Professional (Japan only)
	Windows 7 Professional with Office 2007	•	•	•
	Ready (excludes Japan)
	Windows 7 Professional with Office 2007	•	•	•
	Personal (Japan only)
	Windows 7 Professional with Office 2007	•	•	•
	Personal with PowerPoint (Japan only)
	Windows 7 Professional with Office 2007	•	•	•
	Professional (Japan only)

5

Category	Description	HP ProBook	HP ProBook	HP ProBook
		4520s UMA	4520s	4720s
			discrete	discrete
	Windows Vista Home Basic 32 with Office	•	•	•
	2007 Ready (Japan only)
	Windows Vista Home Basic 32 with Office	•	•	•
	2007 Personal (Japan only)
	Windows Vista Home Basic 32 with Office	•	•	•
	2007 Professional (Japan only)
	Windows Vista Business 32 with Office 2007	•	•	•
	Personal (Japan only)
	Windows Vista Business 32 with Office	•	•	•
	Personal with PowerPoint (Japan only)
	Windows Vista Business 32 with Office	•	•	•
	Professional (Japan only)
	Windows 7 Starter with Office 2007 ready	•	•	•
	(excludes Japan)
	Windows 7 Starter 32 with Office 2007	•	•	•
	ready – EDGI
	Windows 7 Home Basic 32 with Office 2007	•	•	•
	ready (excludes Japan)
	Windows 7 Home Basic with Office 2007	•	•	•
	ready – EDGI
	Windows 7 Home Premium with Office 2007	•	•	•
	ready – EDGI
	Windows 7 Professional 32 with Office 2007	•	•	•
	ready – EDGI
	Windows 7 Professional 32 with XP Pro	•	•	•
	images with Office 2007 ready (excludes
	Japan)
	Windows 7 Professional 32 with XP Pro	•	•	•
	images with Office 2007 ready – EDGI
	Windows 7 Professional 32 with XP Pro	•	•	•
	images with Office 2007 Personal (Japan
	only)
	Windows 7 Professional 32 with XP Pro	•	•	•
	images with Office 2007 Personal with
	PowerPoint (Japan only)
	Preinstalled:
	Windows 7 Professional 32 (Japan only)	•	•	•
	Windows 7 Home Premium 32 (Japan only)	•	•	•
	Windows Vista Home Basic 32 with MS	•	•	•
	Basics (Japan only)

6	Chapter 1 Product description

Category	Description	HP ProBook	HP ProBook	HP ProBook
		4520s UMA	4520s	4720s
			discrete	discrete
	Windows Vista Business 32 with MS Basics	•	•	•
	(Japan only)
	Windows 7 32 (with XP Professional images)	•	•	•
	with MS Basics (Japan only)
	FreeDOS	•	•	•
	RedFlag Linux (People's Republic of China	•	•	•
	only)
	SuSE Linux	•	•	•
	Restore media:
	Windows 7 Home Basic 32	•	•	•
	Windows 7 Home Premium 32	•	•	•
	Windows Vista Business 64	•	•	•
	Windows 7 Professional 32	•	•	•
	Windows 7 Professional 64	•	•	•
	DRDVD Windows 7 – Home Premium/Pro	•	•	•
	DRDVD Windows 7 – Starter/Home Basic	•	•	•
	Windows Vista Home Basic 32	•	•	•
	Windows Vista Home Premium	•	•	•
	Windows Vista Business 32	•	•	•
	Windows XP Professional	•	•	•
	SuSE Linux	•	•	•
	Red Flag Linux (People's Republic of China	•	•	•
	only)
	DRDVD Windows Vista	•	•	•
	DRDVD Windows XP Pro	•	•	•
	Windows Vista Office Ready DVD	•	•	•
	Certified: Microsoft® WHQL	•	•	•
	Web Support:	•	•	•
	All Windows Vista 64 versions	•	•	•
	Windows 7 Professional 64 versions	•	•	•
Serviceability	End-user replaceable parts:
	AC adapter	•	•	•
	Battery (system)	•	•	•

7

Category	Description	HP ProBook	HP ProBook	HP ProBook
		4520s UMA	4520s	4720s
			discrete	discrete
	Hard drive	•	•	•
	Memory module	•	•	•
	Optical drive	•	•	•
	WLAN module	•	•	•
	WWAN module	•	•

8	Chapter 1 Product description

2 External component identification

NOTE: Depending on the operating system installed on your comouter, some components may function differently than described. Some functionality may not be supported by the operating system installed on your computer.

Top Components

TouchPad

Component		Description
(1)	TouchPad off indicator light	To turn the TouchPad zone on and off, quickly double-tap the
		TouchPad off indicator.
		NOTE: When the TouchPad zone is active, the light is off.
(2)	TouchPad zone*	Moves the pointer and selects or activates items on the screen.
(3)	Left TouchPad button	Functions like the left button on an external mouse.

Top Components

9

Component		Description
(4)	Right TouchPad button	Functions like the right button on an external mouse.
*This table describes factory settings.

10 Chapter 2 External component identification

Lights

NOTE: Your computer may look slightly different from the illustration in this section.

Component		Description
(1)	TouchPad off indicator	● Amber: The TouchPad is off.
		● Off: The TouchPad is on.
(2)	Caps lock light	On: Caps lock is on.
(3)	HP QuickLook light	Blinking: QuickLook is being opened or closed.
(4)	HP QuickWeb light	Blinking: QuickWeb browser is being opened or closed.
(5)	Power light	● On: The computer is on.
		● Blinking: The computer is in the Sleep state.
		● Off: The computer is off or in Hibernation.
(5)	Wireless light	● White: An integrated wireless device, such as a wireless
		local area network (WLAN) device and/or a Bluetooth®
		device, is on.

● Amber: All wireless devices are off.

Top Components 11

Buttons, switches, and speakers (select models only)

NOTE: Your computer may look slightly different from the illustration in this section.

Component		Description
(1)	Speakers (2)	Produce sound.
(2)	Internal display switch	Turns off the display if the display is closed while the power is on.
(3)	Power button	●	When the computer is off, press the button to turn on the
			computer.
		●	When the computer is on, press the button to shut down the
			computer.
		●	When the computer is in the Sleep state, press the button
			briefly to exit Sleep.
		●	When the computer is in Hibernation, press the button briefly
			to exit Hibernation.
		If the computer has stopped responding and Windows shutdown
		procedures are ineffective, press and hold the power button for at
		least 5 seconds to turn off the computer.
(4)	Fingerprint reader (select models only)	Allows a fingerprint logon to Windows, instead of a password
		logon.

12 Chapter 2 External component identification

Keys

Component		Description
(1)	esc key	Displays system information when pressed in combination with the
		fn key.
(2)	fn key	Executes frequently used system functions when pressed in
		combination with a function key, the num lk key, or the esc key.
(3)	Windows logo key	Displays the Windows Start menu.
(4)	Windows applications key	Displays a shortcut menu for items beneath the pointer.
(5)	Integrated numeric keypad keys	Can be used like the keys on an external numeric keypad.
(6)	Function keys	Execute frequently used system functions when pressed in
		combination with the fn key.

Top Components 13

Front components

Component		Description
(1)	Drive light	● Blinking white: The hard drive or optical drive is being
			accessed.
		● Amber: HP 3D DriveGuard has temporarily parked the hard
			drive.
(2)	Media Card Reader	Supports the following optional digital card formats:
		●	Memory Stick
		● Memory Stick Duo (adapter required)
		● Memory Stick Pro (adapter required)
		●	MultiMediaCard (MMC)
		● Secure Digital (SD) Memory Card
		● xD-Picture Card (XD)
		● xD-Picture Card (XD) Type H
		● xD-Picture Card (XD) Type M
(3)	Audio-out (headphone) jack	Produces sound when connected to optional powered stereo
		speakers, headphones, ear buds, a headset, or television audio.
		NOTE: When a device is connected to the headphone jack, the
		computer speakers are disabled.
(4)	Audio-in (microphone) jack	Connects an optional computer headset microphone, stereo array
		microphone, or monaural microphone.

Right-side components

14 Chapter 2 External component identification

Component		Description
(1)	USB ports (2)	Connect optional USB devices.
(2)	RJ-11 (modem) jack (select models only)	Connects a modem cable.
(3)	Optical drive (select models only)	Reads optical discs and, on select models, also writes to optical
		discs.
(4)	Optical drive light (select models only)	Blinking: The optical drive is being accessed.
(5)	AC adapter light	●	On: The computer is connected to external power and the
			battery is charging.
		●	Off: The computer is not connected to external power.
(6)	Power connector	Connects an AC adapter.

Right-side components 15

Left-side components

Component		Description
(1)	Security cable slot	Attaches an optional security cable to the computer.
		NOTE: The security cable is designed to act as a deterrent, but it
		may not prevent the computer from being mishandled or stolen.
(2)	Vent	Enables airflow to cool internal components.
		NOTE: The computer fan starts up automatically to cool internal
		components and prevent overheating. It is normal for the internal
		fan to cycle on and off during routine operation.
(3)	External monitor port	Connects an external VGA monitor or projector.
(4)	RJ-45 (network) jack	Connects a network cable.
(5)	HDMI port	Connects an optional HDMI device.
(6)	Combo eSATA/USB port	Connects an optional USB device or high-performance eSATA
		components such as an eSATA external hard drive.
(7)	USB port	Connects optional USB device.
(8)	ExpressCard slot	Supports optional ExpressCards.

16 Chapter 2 External component identification

Bottom components

Component		Description
(1)	Battery release latches (2)	Release the battery from the battery bay.
(2)	Battery bay	Holds the battery.
(3)	SIM slot (select models only)	Contains a wireless subscriber identity module (SIM). The SIM slot
		is located inside the battery bay.

Display

NOTE: Your computer may look slightly different from the illustration in this section.

Bottom components 17

Component		Description
(1)	Internal display switch	Turns off the display if the display is closed while the power is on.
(2)	Internal microphone	Records sound.
(3)	Webcam light (select models only)	On: The webcam is in use.
(4)	Webcam (select models only)	Records audio and video and captures still photographs.

18 Chapter 2 External component identification

Wireless antennas

The antennas send and receive signals from one or more wireless devices. These antennas are not visible from the outside of the computer.

Component		Description
(1)	WWAN antennas (2)* (select models only)	Send and receive wireless signals to communicate with wireless
		wide-area networks (WWAN).
(2)	WLAN antennas (2)*	Send and receive wireless signals to communicate with wireless
		local area networks (WLAN).

*The antennas are not visible from the outside of the computer. For optimal transmission, keep the areas immediately around the antennas free from obstructions.

To see wireless regulatory notices, refer to the section of Regulatory, Safety and Environmental Notices that apply to your country or region. These notices are located in Help and Support.

Wireless antennas 19

Additional hardware components

Component		Description
(1)	Power cord*	Connects an AC adapter to an AC outlet.
(2)	Battery*	Powers the computer when the computer is not plugged into
		external power.
(3)	AC adapter	Converts AC power to DC power.

*Batteries and power cords vary in appearance by country or region.

20 Chapter 2 External component identification

3 Illustrated parts catalog

Service tag

When ordering parts or requesting information, provide the computer serial number and model description provided on the service tag.

(1)Product name: This is the product name affixed to the front of the computer.

(2)Serial number (s/n): This is an alphanumeric identifier that is unique to each product.

(3)Part number/product number (p/n): This number provides specific information about the product's hardware components. The part number helps a service technician to determine what components and parts are needed.

(4)Model description: This is the alphanumeric identifier used to locate documents, drivers, and support for your computer.

(5)Warranty period: This number describes the duration of the warranty period for this computer.

Service tag 21

Computer major components

Item Description

(1)Display assembly (includes microphone, 2 WLAN antenna transceivers and cables and, on select computer models, 2 WWAN antenna transceivers and cables)

For use only with computers with 17.3-in displays

22 Chapter 3 Illustrated parts catalog