HP ProBook 4740s User Manual
HP Notebook
User Guide
© Copyright 2012 Hewlett-Packard
Development Company, L.P.
Bluetooth is a trademark owned by its
proprietor and used by Hewlett-Packard
Company under license. 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 2012
Document Part Number: 679214–001
Product notice
This guide describes features that are
common to most models. Some features
may not be available on your computer.
To obtain the latest information in this
guide, go to the HP Web site at
http://www.hp.com/support.
Software terms
By installing, copying, downloading, or
otherwise using any software product
preinstalled on this computer, you agree to
be bound by the terms of the HP End User
License Agreement (EULA). If you do not
accept these license terms, your sole
remedy is to return the entire unused
product (hardware and software) within 14
days for a refund subject to the refund
policy of your place of purchase.
For any further information or for requesting
a full refund of the computer, please
contact your local point of sale (the seller).
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
come into contact with 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 Welcome .......................................................................................................................................................... 1
Finding information ............................................................................................................................... 2
2 Getting to know your computer ..................................................................................................................... 4
Top ....................................................................................................................................................... 4
TouchPad ............................................................................................................................ 4
Lights ................................................................................................................................... 5
Buttons, speakers, and fingerprint reader (select models only) ........................................... 7
Keys ................................................................................................................................... 10
Front ................................................................................................................................................... 12
Right ................................................................................................................................................... 13
Left ..................................................................................................................................................... 15
Display ................................................................................................................................................ 17
Bottom ................................................................................................................................................ 19
Identifying the bottom parts of the computer ...................................................................................... 20
3 Networking .................................................................................................................................................... 22
Using an Internet service provider (ISP) ............................................................................................ 23
Identifying wireless and network status icons .................................................................................... 23
Creating a wireless connection .......................................................................................................... 23
Turning wireless devices on and off .................................................................................. 23
Using the wireless button .................................................................................. 23
Using the operating system controls ................................................................. 23
Using a WLAN .................................................................................................................................... 24
Connecting to an existing WLAN ....................................................................................... 24
Setting up a new WLAN ..................................................................................................... 25
Protecting your WLAN ....................................................................................................... 25
Roaming to another network .............................................................................................. 26
Using Bluetooth wireless devices (select models only) ...................................................................... 27
Connecting to a wired network ........................................................................................................... 27
Connecting to a local area network (LAN) (select models only) ........................................ 27
v
4 Keyboard and pointing devices ................................................................................................................... 29
Using the keyboard ............................................................................................................................ 29
Identifying the hot keys ...................................................................................................... 29
Using keypads ................................................................................................................... 30
Using the embedded numeric keypad ............................................................... 30
Turning the embedded numeric keypad on and off .......................... 30
Switching key functions on the embedded numeric keypad ............. 31
Using the integrated numeric keypad ................................................................ 31
Using an optional external numeric keypad ...................................................... 31
Using the TouchPad ........................................................................................................................... 32
Turning the TouchPad off and on ...................................................................................... 32
Navigating .......................................................................................................................... 32
Selecting ............................................................................................................................ 33
Using TouchPad gestures ................................................................................................. 33
Scrolling ............................................................................................................ 34
Pinching/Zooming ............................................................................................. 34
Setting pointing device preferences ................................................................................... 34
5 Multimedia ..................................................................................................................................................... 35
Using the audio features .................................................................................................................... 35
Adjusting the volume ......................................................................................................... 36
Checking your audio functions ........................................................................................... 36
Using the Webcam (select models only) ............................................................................................ 37
Using video devices ........................................................................................................................... 37
VGA ................................................................................................................................... 37
HDMI .................................................................................................................................. 39
Configuring audio for HDMI ............................................................................... 39
6 Power management ...................................................................................................................................... 40
Shutting down the computer ............................................................................................................... 40
Setting power options ......................................................................................................................... 40
Using power-saving states ................................................................................................. 40
Initiating and exiting Suspend ........................................................................... 41
Initiating and exiting Hibernation ....................................................................... 41
Using the Power icon ......................................................................................................... 42
Using power management ................................................................................................. 42
Viewing the current power management settings ............................................. 42
Changing the current power management settings .......................................... 42
Using battery power ........................................................................................................................... 42
Displaying the remaining battery charge ........................................................................... 43
vi
Inserting or removing the battery ....................................................................................... 43
Charging a battery ............................................................................................................. 44
Maximizing battery life ....................................................................................................... 45
Managing low battery levels .............................................................................................. 45
Identifying low battery levels ............................................................................. 45
Resolving a low battery level ............................................................................. 46
Resolving a low battery level when external power is available ....... 46
Resolving a low battery level when a charged battery is available ... 46
Resolving a low battery level when no power source is available .... 46
Resolving a low battery level when the computer cannot exit
Hibernation ....................................................................................... 46
Conserving battery power .................................................................................................. 46
Storing a battery ................................................................................................................ 46
Disposing of a used battery ............................................................................................... 47
Replacing the battery ......................................................................................................... 47
Using external AC power .................................................................................................................... 47
Testing an AC adapter ....................................................................................................... 48
7 Drives ............................................................................................................................................................. 49
Handling drives ................................................................................................................................... 49
Using the optional security screw ....................................................................................................... 50
Removing or replacing the service door ............................................................................................. 50
Removing the service door ................................................................................................ 51
Replacing the service door ................................................................................................ 51
Replacing or upgrading the hard drive ............................................................................................... 53
Removing the hard drive .................................................................................................... 53
Installing a hard drive ......................................................................................................... 55
Using optical drives (select models only) ........................................................................................... 57
Identifying the installed optical drive .................................................................................. 57
Inserting an optical disc ..................................................................................................... 57
Tray-load ........................................................................................................... 57
Removing an optical disc ................................................................................................... 58
Tray-load ........................................................................................................... 58
When the disc tray opens normally .................................................. 58
When the disc tray fails to open ....................................................... 59
8 External cards and devices .......................................................................................................................... 60
Using Media Card Reader cards (select models only) ....................................................................... 60
Inserting a digital card ........................................................................................................ 60
Removing a digital card ..................................................................................................... 60
Using a USB device ........................................................................................................................... 61
vii
Connecting a USB device .................................................................................................. 62
Removing a USB device .................................................................................................... 62
Using optional external devices .......................................................................................................... 63
Using optional external drives ............................................................................................ 63
9 Memory modules .......................................................................................................................................... 64
10 Security ........................................................................................................................................................ 67
Protecting the computer ..................................................................................................................... 67
Using passwords ................................................................................................................................ 68
Setting passwords in the operating system ....................................................................... 68
Setting passwords in Computer Setup .............................................................................. 68
Managing a BIOS administrator password ........................................................ 69
Entering a BIOS administrator password .......................................................... 69
Managing a Computer Setup DriveLock password ............................................................................ 70
Managing a DriveLock password ....................................................................................... 70
Entering a DriveLock password ......................................................................................... 70
Using Computer Setup Automatic DriveLock ..................................................................................... 71
Managing an Automatic DriveLock password .................................................................... 71
Using firewall software ....................................................................................................................... 72
Installing an optional security cable .................................................................................................... 73
Using the fingerprint reader (select models only) ............................................................................... 74
Enabling fingerprint authentication during logon ................................................................ 74
Enrolling your fingerprint .................................................................................................... 74
11 Backup and Recovery ................................................................................................................................ 75
Performing a system recovery ............................................................................................................ 75
Backing up your information ............................................................................................................... 76
12 Computer Setup (BIOS) and Advanced System Diagnostics ................................................................. 77
Starting Computer Setup .................................................................................................................... 77
Using Computer Setup ....................................................................................................................... 77
Navigating and selecting in Computer Setup ..................................................................... 77
Restoring factory settings in Computer Setup ................................................................... 78
Updating the BIOS ............................................................................................................................. 79
Determining the BIOS version ........................................................................................... 79
Downloading a BIOS update ............................................................................................. 79
Using Advanced System Diagnostics ................................................................................................. 80
viii
13 MultiBoot ..................................................................................................................................................... 81
About the boot device order ............................................................................................................... 81
Enabling boot devices in Computer Setup ......................................................................................... 82
Considering boot order changes ........................................................................................................ 83
Choosing MultiBoot preferences ........................................................................................................ 84
Setting a new boot order in Computer Setup ..................................................................... 84
Dynamically choosing a boot device using the f9 prompt .................................................. 84
Setting a MultiBoot Express prompt .................................................................................. 85
Entering MultiBoot Express preferences ........................................................................... 85
Appendix A Troubleshooting and support .................................................................................................... 86
Troubleshooting .................................................................................................................................. 86
The computer is unable to start up .................................................................................... 86
The computer screen is blank ............................................................................................ 86
Software is functioning abnormally .................................................................................... 86
The computer is on but not responding ............................................................................. 87
The computer is unusually warm ....................................................................................... 87
An external device is not working ...................................................................................... 87
The wireless network connection is not working ................................................................ 87
The optical disc tray does not open for removal of a CD or DVD ...................................... 88
The computer does not detect the optical drive ................................................................. 89
A disc does not play ........................................................................................................... 89
A movie is not visible on an external display ..................................................................... 89
The process of burning a disc does not begin, or it stops before completion .................... 90
Contacting customer support ............................................................................................................. 90
Labels ................................................................................................................................................. 91
Appendix B Cleaning your computer ............................................................................................................. 92
Cleaning products .............................................................................................................................. 92
Cleaning procedures .......................................................................................................................... 93
Cleaning the display .......................................................................................................... 93
Cleaning the sides and cover ............................................................................................ 93
Cleaning the TouchPad and keyboard .............................................................................. 93
Appendix C Specifications .............................................................................................................................. 94
Input power ......................................................................................................................................... 94
Operating environment ....................................................................................................................... 95
Appendix D Electrostatic discharge .............................................................................................................. 96
ix
Index ................................................................................................................................................................... 97
x
1Welcome
After you set up and register the computer, take the following steps:
● Connect to the Internet—Set up your wired or wireless network so that you can connect to the
Internet. For more information, refer to
Networking on page 22.
● Get to know your computer—Learn about your computer features. Refer to
your computer on page 4 and Keyboard and pointing devices on page 29 for additional
information.
Find installed software—Access a list of the software preinstalled on the computer. Select
●
Computer > More Applications. The list of preinstalled software is displayed.
NOTE: For details about using the software included with the computer, select Computer >
Help. You can also refer to the software manufacturer's instructions, which may be provided with
the software or on the manufacturer's Web site.
Update programs and drivers—Update your programs and drivers with the latest versions on a
●
regular basis. When your computer is registered, it will automatically be updated with the latest
versions. When you register, you can choose to receive automatic notifications when updates
become available. The automatic notifications for operating system updates are available for 90
days. You can also go to
http://www.hp.com/support to download updates from HP.
Getting to know
1
Finding information
The computer comes with several resources to help you perform various tasks.
Resources For information about
Setup Instructions poster
Linux Help
To access the Linux Help, select Computer > Help.
Regulatory, Safety, and Environmental Notices
To access the notices, double-click the HP
Documents icon located on the desktop.
Safety & Comfort Guide
To access this guide, double-click the HP Documents
icon located on the desktop.
– or –
Go to
http://www.hp.com/ergo.
Worldwide Telephone Numbers booklet
This booklet is provided with your computer.
HP Web site
Setting up the computer
●
● Identifying computer components
Computer software
●
● Computer settings
● Connecting to the Internet
● Computer utilities
● Regulatory and safety information
Battery disposal information
●
Proper workstation setup, posture, health, and work habits
●
● Electrical and mechanical safety information
HP support telephone numbers
Support information
●
To access this Web site, go to
support.
http://www.hp.com/
● Ordering parts and finding additional help
● Software, driver, and BIOS updates
● Accessories available for the device
2 Chapter 1 Welcome
Resources For information about
Limited Warranty*
To access the warranty:
Double-click the HP Documents icon located on the
desktop.
– or –
Go to
http://www.hp.com/go/orderdocuments.
*You can find the expressly provided HP Limited Warranty applicable to your product located with the user guides on your
computer and/or on the CD/DVD provided in the box. In some countries/regions, HP may provide a printed HP Limited
Warranty in the box. For some countries/regions where the warranty is not provided in printed format, you may request a
printed copy from
North America: Hewlett-Packard, MS POD, 11311 Chinden Blvd, Boise, ID 83714, USA
●
Europe, Middle East, Africa: Hewlett-Packard, POD, Via G. Di Vittorio, 9, 20063, Cernusco s/Naviglio (MI), Italy
●
● Asia Pacific: Hewlett-Packard, POD, P.O. Box 200, Alexandra Post Office, Singapore 911507
When you request a printed copy of your warranty, please include your product number, warranty period (found on your
serial number label), name, and postal address.
IMPORTANT: Do NOT return your HP product to the addresses above. For U.S. product support, go to
go/contactHP. For worldwide product support, go to http://welcome.hp.com/country/us/en/wwcontact_us.html.
http://www.hp.com/go/orderdocuments or write to:
Warranty information
http://www.hp.com/
Finding information 3
2 Getting to know your computer
Top
TouchPad
NOTE: Your computer may look slightly different from the illustration in this section.
Component Description
(1) TouchPad on/off button Turns the TouchPad on and off.
(2) TouchPad zone Moves the pointer and selects or activates items on the
(3) Left TouchPad button Functions like the left button on an external mouse.
(4) Right TouchPad button Functions like the right button on an external mouse.
4 Chapter 2 Getting to know your computer
screen.
Lights
NOTE: Refer to the illustration that most closely matches your computer.
Component Description
(1)
(2) Caps lock light On: Caps lock is on.
(3)
(4)
(5) TouchPad light
Power light
Web browser light
Wireless light
On: The computer is on.
●
● Blinking: The computer is in the Suspend state.
Off: The computer is off or in Hibernation.
●
On: The computer is on.
●
● Off: The computer is off, in the Suspend state, or in
Hibernation.
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.
●
Amber: The TouchPad is off.
●
● Off: The TouchPad is on.
Top 5
Component Description
(1)
(2) Caps lock light On: Caps lock is on.
(3)
(4)
(5) TouchPad light ● Amber: The TouchPad is off.
Power light ● On: The computer is on.
Blinking: The computer is in the Suspend state.
●
Off: The computer is off or in Hibernation.
●
Web browser light ● On: The computer is on.
Off: The computer is off, in the Suspend state, or in
●
Hibernation.
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.
Off: The TouchPad is on.
●
6 Chapter 2 Getting to know your computer
Buttons, speakers, and fingerprint reader (select models only)
NOTE: Refer to the illustration that most closely matches your computer.
Component Description
(1)
(2) Speakers (2) Produce sound.
Power button
When the computer is off, press the button to turn on
●
the computer.
● When the computer is on, press the button briefly to
initiate Suspend.
● When the computer is in the Suspend state, press the
button briefly to exit Suspend.
When the computer is in Hibernation, press the button
●
briefly to exit Hibernation.
If the computer has stopped responding and operating
system shutdown procedures are ineffective, press and hold
the power button for at least 5 seconds to turn off the
computer.
CAUTION: Emergency shutdown procedures result in the
loss of unsaved information.
To learn more about your power settings:
1. Select Computer > Control Center.
2. In the left pane, click System, and then click Power
Management in the right pane.
Top 7
Component Description
(3)
(4)
(5) Fingerprint reader (select models only) Allows a fingerprint logon to the operating system, instead of
Web browser button (select models only) Opens the default Web browser.
Wireless button Turns the wireless feature on or off but does not establish a
wireless connection.
NOTE: A wireless connection may be established if one
has been previously configured.
a password logon.
8 Chapter 2 Getting to know your computer
Component Description
(1)
(2) Speakers (2) Produce sound.
(3)
Power button
Web browser button (select models only) Opens the default Web browser.
When the computer is off, press the button to turn on
●
the computer.
● When the computer is on, press the button briefly to
initiate Suspend.
When the computer is in the Suspend state, press the
●
button briefly to exit Suspend.
When the computer is in Hibernation, press the button
●
briefly to exit Hibernation.
If the computer has stopped responding and operating
system shutdown procedures are ineffective, press and hold
the power button for at least 5 seconds to turn off the
computer.
CAUTION: Emergency shutdown procedures result in the
loss of unsaved information.
To learn more about your power settings:
1. Select Computer > Control Center.
2. In the left pane, click System, and then click Power
Management in the right pane.
(4)
(5) Fingerprint reader (select models only) Allows a fingerprint logon to the operating system, instead of
Wireless button Turns the wireless feature on or off but does not establish a
wireless connection.
NOTE: A wireless connection may be established if one
has been previously configured.
a password logon.
Top 9
Keys
NOTE: Refer to the illustration that most closely matches your computer.
Component Description
(1) fn key Executes frequently used system functions when pressed
(2)
(3) Function keys Execute frequently used system functions when pressed in
(4) Embedded numeric keypad keys When the keypad is turned on, it can be used like an
(5)
(6) num lk key Turns the embedded numeric keypad on and off when
Operating system logo key Displays the operating system menu.
Operating system applications key Displays a shortcut menu for items beneath the cursor.
in combination with a function key.
combination with the fn key.
external numeric keypad.
Each key on the keypad performs the function indicated by
the icon in the upper-right corner of the key
pressed in combination with the fn key.
10 Chapter 2 Getting to know your computer
Component Description
(1) fn key Executes frequently used system functions when pressed
(2)
(3) Function keys Execute frequently used system functions when pressed in
(4)
(5) num lk key Alternates between the navigational and numeric functions
(6) Integrated numeric keypad Can be used like an external numeric keypad.
Operating system logo key Displays the operating system menu.
Operating system applications key Displays a shortcut menu for items beneath the cursor.
in combination with a function key.
combination with the fn key.
on the integrated numeric keypad.
Top 11
Front
Component Description
(1)
(2) Media Card Reader Supports the following digital card formats:
(3)
Hard drive light
Audio-out (headphone) jack Connects optional powered stereo speakers, headphones,
Blinking white: The hard drive is being accessed.
●
● Amber: HP 3D DriveGuard has temporarily parked
the hard drive.
● Memory Stick PRO
Memory Stick PRO Duo (needs an adapter)
●
MultiMediaCard (MMC)
●
● MultiMediaCardPlus (MMC+)
Secure Digital (SD) Card
●
Secure Digital High Capacity (SDHC) Card
●
● Secure Digital Extra Capacity (SDXC) Card
earbuds, a headset, or a television audio cable.
WARNING! To reduce the risk of personal injury, adjust
the volume before putting on headphones, earbuds, or a
headset. For additional safety information, refer to the
Regulatory, Safety, and Environmental Notices.
NOTE: When a device is connected to the jack, the
computer speakers are disabled.
(4)
Audio-in (microphone) jack Connects an optional computer headset microphone,
12 Chapter 2 Getting to know your computer
stereo array microphone, or monaural microphone.
Right
NOTE: Refer to the illustration that most closely matches your computer.
Component Description
(1)
(2)
(3) Optical drive (select models only) Reads an optical disc.
(4) Optical drive light (select models only) Lights when the optical drive is active.
(5) Optical drive eject button (select models
(6) Power connector Connects an AC adapter.
(7)
USB 3.0 port Connects an optional USB device.
USB 2.0 port Connects an optional USB device.
NOTE: On select models, the optical drive also
writes to an optical disc.
only)
AC adapter/Battery light ● Amber: The computer is connected to external
Releases the optical drive disc tray.
power and the battery is charged from 0 to 90
percent.
● White: The computer is connected to external
power and the battery is charged from 90 to 99
percent.
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: The battery is fully charged.
Right 13
Component Description
(1)
(2) Optical drive (select models only) Reads an optical disc.
(3) Optical drive light (select models only) Lights when the optical drive is active.
(4) Optical drive eject button (select models
USB 2.0 ports (2) Connect optional USB devices.
NOTE: On select models, the optical drive also
writes to an optical disc.
Releases the optical drive disc tray.
only)
14 Chapter 2 Getting to know your computer
Left
NOTE: Refer to the illustration that most closely matches your computer.
Component Description
(1)
(2) Vent Enables airflow to cool internal components.
(3)
(4)
(5)
(6)
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.
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.
External monitor port Connects an external VGA monitor or projector.
RJ-45 (network) jack Connects a network cable.
HDMI port Connects an optional video or audio device, such as a
high-definition television, or any compatible digital or
audio component.
USB 3.0 ports (2) Connect optional USB devices.
Left 15
Component Description
(1)
(2) Power connector Connects an AC adapter.
(3)
(4) Vent Enables airflow to cool internal components.
(5)
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.
AC adapter/Battery light
External monitor port Connects an external VGA monitor or projector.
Amber: The computer is connected to external
●
power and the battery is charged from 0 to 90
percent.
White: The computer is connected to external power
●
and the battery is charged from 90 to 99 percent.
● 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: The battery is fully charged.
●
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.
(6)
(7)
(8)
RJ-45 (network) jack Connects a network cable.
HDMI port Connects an optional video or audio device, such as a
high-definition television, or any compatible digital or
audio component.
USB 3.0 ports (2) Connect optional USB devices.
16 Chapter 2 Getting to know your computer
Display
NOTE: Refer to the illustration that most closely matches your computer.
Component Description
(1) WLAN antennas (2)* Send and receive wireless signals to communicate with wireless
local area networks (WLAN).
(2) Internal microphones (1 or 2 depending on
model)
(3) Webcam light (select models only) On: The webcam is in use.
(4) Webcam (select models only) Records video and captures still photographs.
(5) Internal display switch Turns off the display or initiates Suspend if the display is closed
*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 the Regulatory, Safety,
and Environmental Notices that applies to your country or region.
Record sound.
while the power is on.
NOTE: The display switch is not visible from the outside of the
computer.
Display 17
Component Description
(1) WLAN antennas (2)* Send and receive wireless signals to communicate with wireless
(2) Internal microphones (1 or 2 depending on
model)
(3) Webcam light (select models only) On: The webcam is in use.
(4) Webcam (select models only) Records video and captures still photographs.
(5) Internal display switch Turns off the display or initiates Suspend if the display is closed
*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 the Regulatory, Safety,
and Environmental Notices that applies to your country or region.
local area networks (WLAN).
Record sound.
while the power is on.
NOTE: The display switch is not visible from the outside of the
computer.
18 Chapter 2 Getting to know your computer
Bottom
Component Description
(1)
(2) Battery bay Contains the battery.
(3)
(4) Vents (2) Enable airflow to cool internal components.
Battery and service door release
latches
Service door Protects the hard drive bay, the wireless LAN
Releases the battery from the battery bay by
●
sliding the release latches one time.
When the battery has been removed from the
●
battery bay, releases the service door from
the computer by sliding the release latches a
second time.
(WLAN) module slot, and the memory module
slots.
CAUTION: To prevent an unresponsive system,
replace the wireless module only with a wireless
module authorized for use in the computer by the
governmental agency that regulates wireless
devices in your country or region. 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.
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.
Bottom 19
Identifying the bottom parts of the computer
NOTE: Refer to the illustration that most closely matches your computer. The service door has been
removed in these illustrations.
Components Description
(1)
20 Chapter 2 Getting to know your computer
Memory modules
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