HP WT148EA, WT149EA User guide

Compaq 325 and 326 Notebook PCs HP 425 and 625 Notebook PCs

Maintenance and Service Guide

AMD Athlon, AMD Sempron, and AMD Turion are trademarks of Advanced Micro Devices, Inc. Bluetooth is a trademark owned by its proprietor and used by HewlettPackard Company under license. 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: May 2009

Document Part Number: 601870-001

MSG revision history

Revision Publication date Description

A October 2010 Updated AC adapter part numbers:

613149-001–65-W AC adapter for use with computers with UMA graphics

●

613150-001–90-W AC adapter for use with computers with discrete graphics

●

iii

iv MSG revision history

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).

vi Safety warning notice

Table of contents

1 Product description ........................................................................................................................................ 1

2 External component identification ................................................................................................................ 8

Top components ................................................................................................................................... 8

TouchPad ............................................................................................................................ 8

Lights ................................................................................................................................... 9

Buttons, switch, and speaker ............................................................................................. 11

Keys ................................................................................................................................... 12

Front components .............................................................................................................................. 14

Right-side components ....................................................................................................................... 15

Left-side components ......................................................................................................................... 16

Bottom components ........................................................................................................................... 17

Multimedia components ..................................................................................................................... 19

Wireless antennas (select models only) ............................................................................................. 20

Additional hardware components ....................................................................................................... 21

3 Illustrated parts catalog ............................................................................................................................... 22

Service tag ......................................................................................................................................... 22

Computer major components ............................................................................................................. 23

Display assembly components ........................................................................................................... 29

Plastics Kit .......................................................................................................................................... 30

Cables ................................................................................................................................................ 31

Mass storage devices ......................................................................................................................... 33

Miscellaneous parts ............................................................................................................................ 34

Sequential part number listing ............................................................................................................ 35

4 Removal and replacement procedures ....................................................................................................... 41

Preliminary replacement requirements ............................................................................................... 41

Tools required .................................................................................................................... 41

Service considerations ....................................................................................................... 41

Plastic parts ....................................................................................................... 41

Cables and connectors ..................................................................................... 42

Drive handling ................................................................................................... 42

vii

Grounding guidelines ......................................................................................................... 43

Electrostatic discharge damage ........................................................................ 43

Packaging and transporting guidelines ............................................. 44

Workstation guidelines ..................................................................... 44

Equipment guidelines ....................................................................... 45

Component replacement procedures ................................................................................................. 46

Service tag ......................................................................................................................... 46

Computer feet .................................................................................................................... 47

Battery ............................................................................................................................... 48

Service door ....................................................................................................................... 49

Hard drive .......................................................................................................................... 51

Memory module ................................................................................................................. 54

WLAN module .................................................................................................................... 55

Optical drive ....................................................................................................................... 57

Fan ..................................................................................................................................... 59

Heat sink ............................................................................................................................ 60

Processor ........................................................................................................................... 62

Palm rest ............................................................................................................................ 64

Keyboard ........................................................................................................................... 67

Top cover ........................................................................................................................... 71

Power switch board ........................................................................................................... 76

Bluetooth module ............................................................................................................... 78

USB connector assembly .................................................................................................. 79

Speaker ............................................................................................................................. 81

Display assembly ............................................................................................................... 82

System board ..................................................................................................................... 90

Main battery connector ...................................................................................................... 94

RTC battery ....................................................................................................................... 96

Modem module .................................................................................................................. 97

Audio board ....................................................................................................................... 99

5 Computer Setup .......................................................................................................................................... 101

Computer Setup in Windows ............................................................................................................ 101

Starting Computer Setup ................................................................................................. 101

Using Computer Setup .................................................................................................... 101

Navigating and selecting in Computer Setup .................................................. 101

Restoring factory settings in Computer Setup ................................................. 102

Computer Setup menus ................................................................................................... 103

File menu ........................................................................................................ 103

Security menu ................................................................................................. 104

System Configuration menu ............................................................................ 105

Computer Setup in Linux .................................................................................................................. 109

Starting Computer Setup ................................................................................................. 109

viii

Using Computer Setup .................................................................................................... 110

Navigating and selecting in Computer Setup .................................................. 110

Restoring factory settings in Computer Setup ................................................. 110

Computer Setup menus ................................................................................................... 111

File menu ........................................................................................................ 111

Security menu ................................................................................................. 112

Diagnostics menu ............................................................................................ 112

System Configuration menu ............................................................................ 113

6 Specifications .............................................................................................................................................. 115

Computer specifications ................................................................................................................... 115

39.6-cm (15.6-in) display specifications ........................................................................................... 116

35.6-cm (14.0-in) display specifications ........................................................................................... 117

33.8-cm (13.3-in) display specifications ........................................................................................... 118

Hard drive specifications .................................................................................................................. 119

DVD-ROM Drive specifications ........................................................................................................ 120

DVD±RW Double-Layer Combo Drive specifications ....................................................................... 121

7 Backup and recovery .................................................................................................................................. 122

Backup and recovery in Windows 7 ................................................................................................. 122

Overview .......................................................................................................................... 122

Backing up your information ............................................................................................ 122

Performing a recovery ..................................................................................................... 124

Using the Windows recovery tools ................................................................................... 124

Using f11 .......................................................................................................................... 125

Using a Windows 7 operating system DVD (purchased separately) ............................... 125

Backup and recovery in Windows Vista ........................................................................................... 126

Overview .......................................................................................................................... 126

Backing up your information ............................................................................................ 126

Performing a recovery ..................................................................................................... 127

Using the Windows recovery tools ................................................................................... 128

Using f11 .......................................................................................................................... 128

Using a Windows Vista operating system DVD (purchased separately) ......................... 129

Backup and recovery in Windows XP .............................................................................................. 130

Overview .......................................................................................................................... 130

Backing up your information ............................................................................................ 130

Performing a recovery ..................................................................................................... 131

Recovering your information ........................................................................... 131

Recovering the operating system and programs ............................................ 131

8 Connector pin assignments ....................................................................................................................... 132

Audio-in (microphone) ...................................................................................................................... 132

Audio-out (headphone) ..................................................................................................................... 132

External monitor ............................................................................................................................... 133

HDMI ................................................................................................................................................ 134

RJ-11 (modem) ................................................................................................................................ 135

RJ-45 (network) ................................................................................................................................ 136

Universal Serial Bus ......................................................................................................................... 136

9 Power cord set requirements .................................................................................................................... 137

Requirements for all countries and regions ...................................................................................... 137

Requirements for specific countries and regions ............................................................................. 138

10 Recycling ................................................................................................................................................... 139

Battery .............................................................................................................................................. 139

Display .............................................................................................................................................. 139

Index ................................................................................................................................................................. 145

1 Product description

Category Description Compaq 325

model, UMA graphics, RS880M chipset

Product Name Compaq 325 Notebook PC √

Compaq 326 Notebook PC √

HP 425 Notebook PC √

HP 625 Notebook PC √

Processors AMD processors

AMD Turion™ II Dual-Core P520 2.30-GHz

with 2-MB L2 cache

AMD Athlon™ II Dual-Core P320 2.1-GHz

with 2-MB L2 cache

AMD Phenom II Champlain P820 25-W √√ √

AMD V-Series Single-Core V120 2.2-GHz

with 2-MB L2 cache

Chipsets AMD RS880M, UMA √ √

AMD RS880MD, Discrete √

√√ √

Compaq 326 model, Discrete graphics, RS880MD chipset

HP 425/625 models, UMA graphics, RS880M chipset

AMD SB820, Southbridge √√ √

Graphics AMD Universal Memory Architecture (UMA)

graphics subsystem integrated with shared video memory (dynamically allocated)

Discrete graphics AMD M93S3–LP with

Hypermemory support, 512MB (64MX16) x 4

ATI Mobility Radeon HD 4200 √ √

ATI Mobility Radeon HD 4350 with 512-MB

memory

Panels All display assemblies support privacy filter √√ √

√ √

√

Category Description Compaq 325

model, UMA graphics, RS880M chipset

Compaq 326 model, Discrete graphics, RS880MD chipset

HP 425/625 models, UMA graphics, RS880M chipset

33.8-cm (13.3-in) HD LED backlight panel:

1366×768 AntiGlare

●

1366×768 AntiGlare with webcam

●

1366×768 BrightView

●

1366×768 BrightView with Webcam

●

35.6-cm (14.0-in) HD LED backlight panel:

1366×768 AntiGlare

●

1366×768 AntiGlare with webcam

●

1366×768 BrightView

●

1366×768 BrightView with Webcam

●

39.6-cm (15.6-in) HD LED backlight panel:

1366×768 AntiGlare

●

1366×768 AntiGlare with webcam

●

1366×768 BrightView

●

1366×768 BrightView with Webcam

●

Memory 2 customer-accessible/upgradable memory

module slots

√√ √

Supports dual-channel memory √√ √

Supports up to 8 GB of system RAM √√ √

PC3-10600, 1333-MHz, DDR3 √√ √

Supports the following configurations in all

countries and regions:

8192-MB total system memory (4096-

●

MB x 2, dual-channel)

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 Compaq 325

model, UMA graphics, RS880M chipset

Compaq 326 model, Discrete graphics, RS880MD chipset

HP 425/625 models, UMA graphics, RS880M chipset

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

●

500-GB, 5400-rpm

●

320-GB, 7200-rpm

●

320-GB, 5400-rpm

●

250-GB, 7200-rpm

●

250-GB, 5400-rpm

●

160-GB, 7200-rpm

●

160-GB, 5400-rpm

●

HP 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 Drive with Lightscribe

●

Diskette drive Supports external USB diskette drive only √√ √

Audio/Visual IDT 92HD88 √√ √

Integrated microphone √√ √

Single speaker √√ √

Headphone and microphone jacks √√ √

Integrated 2MP camera with fixed focus

(select models only)

Modem 56K V.92 3.8 cm (1.5-in) data/fax modem √√ √

Supports no modem option √√ √

For use in all countries and regions except

APJ

For use in APJ only √√ √

Modem cable not included √√ √

√√ √

√ √

Category Description Compaq 325

model, UMA graphics, RS880M chipset

Compaq 326 model, Discrete graphics, RS880MD chipset

HP 425/625 models, UMA graphics, RS880M chipset

Ethernet 10/100 Ethernet network interface card

(NIC)

S3/S4/S5 wake on LAN: AC only mode √√ √

Ethernat cable not included √√ √

Wireless Integrated WLAN options by way of MiniPCI card:

2 WLAN antennas built into display

assembly

Supports option for no-WLAN √√ √

Ethernet cable not included √√ √

Support for the following WLAN formats:

Broadcom 802.11b/g

●

Broadcom 802.11b/g/n (1 x 1)

●

Atheros 802.11 b/g/n (1 x 1)

●

Realtek 802.11 b/g/n (1 x 1)

●

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

Support option for no-WPAN √√ √

Bluetooth 2.1 √√ √

√√ √

External media cards

Media Card Reader supporting Secure

Ports Audio-in (microphone) √√ √

Audio-out (stereo headphone) √√ √

RJ-11 (modem) √√ √

RJ-45 (Ethernet, includes link and activity

USB 2.0 (3) √√ √

HP non-Smart adapter √√ √

VGA (Dsub 15-pin) supporting 1600 × 1200

Power adapter jack (2–pin non-smart

HDMI √√ √

One ExpressCard/34-mm √√ √

√√ √

Digital (SD) Memory Card, Secure Digital High Capacity (SDHC) Memory Card, MultiMediaCard (MMC) formats

√√ √

lights)

√√ √

external resolution at 75-GHz (hot plug/ unplug with auto-detect)

√√ √

adapter)

4 Chapter 1 Product description

Category Description Compaq 325

model, UMA graphics, RS880M chipset

Compaq 326 model, Discrete graphics, RS880MD chipset

HP 425/625 models, UMA graphics, RS880M chipset

Keyboard/pointing devices

35.6-cm (14.0-in)/33.8-cm (13.3-in)

Supports 2-way scroll with legend and

Power requirements

90-W non-Smart AC adapter √

6-cell, 47-Wh Li-ion battery √√ √

9-cell, 93-Wh Li-ion battery √√ √

Security Supports Kensington security lock √√ √

Operating system Preinstalled with Microsoft Office: √√ √

Windows 7 Home Premium 32 with Office

Windows 7 Home Premium with Office 2007

Windows 7 Home Premium 32 with Office

39.6-cm (15.6-in) keyboard with TouchPad √√ √

√√ √

keyboard with TouchPad

√√ √

gestures (taps enabled as default)

65-W non-Smart AC adapter √ √

√√ √

2007 Ready (excludes Japan)

√√ √

Ready — EDGI

√√ √

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 32 with Office 2007

Ready (excludes Japan)

Windows 7 Professional with Office 2007

Ready – EDGI

Windows 7 Professional 32 with Office 2007

Personal (Japan only)

Windows 7 Professional 32 with Office 2007

Personal with PowerPoint (Japan only)

Windows 7 Professional 32 with Office 2007

Professional (Japan only)

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)

√√ √

Category Description Compaq 325

model, UMA graphics, RS880M chipset

Compaq 326 model, Discrete graphics, RS880MD chipset

HP 425/625 models, UMA graphics, RS880M chipset

Windows 7 Professional 32 with XP Pro

images with Office 2007 Personal with PowerPoint (Japan only)

Windows 7 Professional 32 with XP Pro

images with Office 2007 Professional (Japan only)

Windows Vista Home Basic 32 with Office

2007 Ready (excludes Japan)

Windows Vista Home Basic 32 with Office

2007 Personal (Japan only)

Windows Vista Home Basic 32 with Office

2007 Personal and PowerPoint (Japan only)

Windows Vista Home Basic 32 with Office

2007 Professional (Japan only)

Windows 7 Starter with Office 2007 Ready √√ √

Windows 7 Starter 32 with Office 2007

Ready – EDGI

Windows 7 Home Basic 32 with Office 2007

Ready (excludes Japan)

Windows 7 Home Basic 32 with Office 2007

Ready and 1 year McCaffee (People's Republic of China only)

√√ √

Windows 7 Home Basic with Office 2007

Ready – EDGI

Preinstalled with Microsoft Basics:

Windows 7 Professional 32 (Japan only) √√ √

Windows 7 Home Premium 32 (Japan only) √√ √

Windows Vista Home Basic 32 (Japan only) √√ √

Windows 7 Professional 32 (with XP Pro

images) (Japan only)

Preinstalled:

FreeDOS √√ √

RedFlag Linux (People's Republic of China

only)

SuSE Linux √√ √

Restore media:

Windows 7 Home Basic 32 √√ √

Windows 7 Home Premium 32 √√ √

Windows 7 Home Premium 64 √√ √

√√ √

6 Chapter 1 Product description

Category Description Compaq 325

model, UMA graphics, RS880M chipset

Windows XP Pro √√ √

Windows 7 Starter √√ √

Windows Vista Basic 32 √√ √

Windows 7 Professional 32 √√ √

Windows 7 Professional 64 √√ √

DRDVD Windows 7 – Home Premium/Pro √√ √

DRDVD Windows 7 – Starter/Home Basic √√ √

Windows XP Professional √√ √

SRDVD SuSE Linux √√ √

Compaq 326 model, Discrete graphics, RS880MD chipset

HP 425/625 models, UMA graphics, RS880M chipset

Red Flag Linux (People's Republic of China

only)

DRDVD Windows XP Pro √√ √

Windows Vista Office Ready DVD √√ √

Certified:

Microsoft® WHQL √√ √

SuSE Linux √√ √

Web Support:

All Windows Vista 64 versions √√ √

Windows 7 Professional 64 versions √√ √

SuSE Linux √√ √

Serviceability End-user replaceable parts:

AC adapter √√ √

Battery (system) √√ √

Hard drive √√ √

Memory module √√ √

Keyboard √√ √

√√ √

Optical drive √√ √

WLAN module √√ √

2 External component identification

Top components

TouchPad

Component Description

(1) TouchPad Moves the pointer and selects or activates items on the screen.

(2) TouchPad button The left and right sides of the single button function like the left

(3) TouchPad scroll zone Scrolls up or down.

8 Chapter 2 External component identification

and right buttons on an external mouse.

Lights

NOTE: Refer to the illustration that most closely matches your computer.

Component Description

(1) Caps lock light On: Caps lock is on.

Top components 9

Component Description

(2) Power light

(3) Wireless light

On: The computer is on.

●

Blinking: The computer is in the Sleep state in Windows 7

●

or Windows Vista, or in Standby in Windows XP.

Off: The computer is off or in Hibernation.

●

White: An integrated wireless device, such as a wireless

●

local area network (WLAN) device is on.

Amber: All wireless devices are off.

●

10 Chapter 2 External component identification

Buttons, switch, and speaker

Component Description

(1) Speaker Produces sound.

(2) Internal display switch Turns off the display if the panel lid 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 or in Standby,

●

press the button briefly to exit Sleep or Standby.

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.

Top components 11

Keys

NOTE: Refer to the illustration and table that most closely matches your computer.

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 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 cursor.

(5) Embedded numeric keypad keys Can be used like the keys on an external numeric keypad when

pressed in combination with the fn and num lk keys.

(6) Function keys Execute frequently used system functions when pressed in

combination with the fn key.

(7) Wireless key Because the wireless devices are enabled at the factory, use the

wireless key to turn on or turn off the wireless devices simultaneously.

12 Chapter 2 External component identification

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 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 cursor.

(5) Embedded numeric keypad keys Can be used like the keys on an external numeric keypad when

pressed in combination with the fn and num lk keys.

(6) Wireless key Because the wireless devices are enabled at the factory, use the

wireless key to turn on or turn off the wireless devices simultaneously.

(7) Function keys Execute frequently used system functions when pressed in

combination with the fn key.

Top components 13

Front components

Component Description

(1) SD Card Reader Supports the following optional digital card formats:

(2) Audio-out (headphone) jack Produces sound when connected to optional powered stereo

MultiMediaCard (MMC)

●

MultiMediaCard 4.2 (MMC Plus, including MMC Plus HC)

●

Secure Digital (SD) Memory Card

●

Secure Digital High Capacity (SDHC) Memory Card

●

Secure Digital High Speed (SDHS) Memory Card

●

speakers, headphones, ear buds, a headset, or television audio.

NOTE: When a device is connected to the headphone jack, the

computer speakers are disabled.

(3) Audio-in (microphone) jack Connects an optional computer headset microphone, stereo

array microphone, or monaural microphone.

14 Chapter 2 External component identification

Right-side components

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

(4) Optical drive light (select models only) Blinking: The optical drive is being accessed.

(5) Optical drive button (select models only) Opens optical drive tray.

discs.

Right-side components 15

Left-side components

Component Description

(1) ExpressCard slot Supports optional ExpressCards.

(2) Security cable slot Attaches an optional security cable to the computer.

(3) Vent Enables airflow to cool internal components.

NOTE: The security cable is designed to act as a deterrent, but

it may not prevent the computer from being mishandled or stolen.

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.

(4) External monitor port Connects an external VGA monitor or projector.

(5) Battery light

(6) Power connector Connects an AC adapter.

(7) RJ-45 (network) jack Connects a network cable.

(8) HDMI port Connects an optional HDMI device.

(9) USB port (1) Connects optional USB devices.

Amber: A battery is charging.

●

Turquoise: A battery is close to full charge capacity.

●

Blinking amber: A battery that is the only available power

●

source has reached a low battery level. When the battery reaches a critical battery level, the battery light begins blinking rapidly.

Off: If the computer is plugged into an external power

●

source, the light turns off when all batteries in the computer are fully charged. If the computer is not plugged into an external power source the light stays off until the battery reaches a low battery level.

16 Chapter 2 External component identification

Bottom components

NOTE: Refer to the illustration that most closely matches your computer.

Component Description

(1) Battery release latches (2) Release the battery from the battery bay.

Bottom components 17

Component Description

(2) Battery bay Holds the battery.

(3) Vents (3) Enable 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.

(4) Memory module compartment Contains the memory module slots.

WLAN module compartment Contains the wireless LAN module slot.

CAUTION: To prevent an unresponsive system and the display

of a warning message, replace the WLAN module with only a module authorized for use in the computer by the governmental agency that regulates wireless devices in your country. If you replace the module and then receive a warning message, remove the module to restore computer functionality, and then contact technical support through Help and Support.

Hard drive bay Holds the hard drive.

18 Chapter 2 External component identification

Multimedia components

Component Description

(1) Webcam light (select models only) On: The webcam is in use.

(2) Webcam (select models only) Records video and captures still photographs.

(3) Integrated microphone Records sound.

(4) 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.

(5) Audio-in (microphone) jack Connects an optional computer headset microphone, stereo

(6) Speaker Produces sound.

array microphone, or monaural microphone.

Multimedia components 19

Wireless antennas (select models only)

On select computer models, at least 2 antennas send and receive signals from one or more wireless devices. These antennas are not visible from the outside of the computer.

NOTE: For optimal transmission, keep the areas immediately around the antennas free from

obstructions.

Component Description

WLAN antennas (2)* Send and receive wireless signals to communicate with wireless

local area networks (WLANs).

*The antennas are not visible from the outside of the computer.

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

20 Chapter 2 External component identification

+ 128 hidden pages