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Compaq Presario V5000 User Guide - Page 174

The computer cannot connect to a wireless local area network (WLAN).

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The computer cannot connect to a wireless local area network (WLAN). If the computer cannot connect to a WLAN: ● Verify that the computer is within optimal range of a wireless router (access point). ● Verify that the wireless light on the computer is turned on. ● Verify that the computer wireless antennae are free from obstructions. ● Verify that the wireless router and broadband modem are working correctly. 164 Chapter 15 Troubleshooting ENWW

Section	Page
Notebook Tour	11
Components	11
Top components	12
Keys	12
TouchPad	13
Buttons and switches	14
Lights	15
Front components	16
Rear components	16
Right-side components	17
Left-side components	18
Bottom components	19
Wireless antennae (select models only)	20
Additional hardware components	21
Labels	22
Specifications	23
Operating environment	23
Rated input power	23
Expansion port input/output signals	24
TouchPad and Keyboard	25
TouchPad	25
Using the TouchPad	26
Using an external mouse	26
Setting TouchPad preferences	26
Keyboard	27
Hotkeys	27
Hotkey quick reference	28
Hotkey procedures	28
Display and clear system information (fn+esc)	28
Open the Help and Support Center (fn+f1)	29
Open the Print Options window (fn+f2)	29
Open a Web browser (fn+f3)	29
Switch the screen image (fn+f4)	30
Initiate standby (fn+f5)	30
Initiate QuickLock (fn+f6)	31
Decrease screen brightness (fn+f7)	31
Increase screen brightness (fn+f8)	31
Play, pause or resume an audio CD or a DVD (fn+f9)	31
Stop an audio CD or a DVD (fn+f10)	31
Play previous track or section of an audio CD or a DVD (fn+f11)	31
Play next track or section of an audio CD or a DVD (fn+f12)	31
Keypads	32
Using the embedded numeric keypad	32
Enabling and disabling the embedded numeric keypad	32
Switching key functions on the embedded numeric keypad	33
Using an external numeric keypad	33
Enabling or disabling num lock mode as you work	33
Power	35
Power control and light locations	35
Power sources	37
Connecting the AC adapter	38
Standby and hibernation	39
Standby	39
Hibernation	39
Initiating standby, hibernation or shutdown	40
When you leave your work	40
When a reliable power supply is unavailable	40
When using wireless communication or readable or writable media (select models only)	41
Default power settings	42
Turning the computer or display on or off	42
Using emergency shutdown procedures	42
Initiating or resuming from standby	43
Initiating or restoring from hibernation	44
Power options	45
Accessing Power Options Properties	45
Displaying the Power Meter icon	45
Setting or changing a power scheme	46
Setting a security prompt	46
Processor performance controls	47
Battery packs	48
Inserting or removing a battery pack	48
Charging a battery pack	49
Monitoring the charge of the battery pack	50
Obtaining accurate charge information	50
Displaying charge information on the screen	50
Viewing charge displays	50
Interpreting charge indicators	50
Managing low-battery conditions	51
Identifying low-battery conditions	51
Low-battery condition	51
Critical low-battery condition	51
Resolving low-battery conditions	52
When external power is available	52
When a charged battery pack is available	52
When no power source is available	52
When the computer cannot restore from hibernation	52
Calibrating a battery pack	53
When to calibrate	53
How to calibrate	53
Step 1: Charging the battery pack	53
Step 2: Discharging the battery pack	54
Step 3: Recharging the battery pack	55
Conserving battery power	55
Conserving power as you work	55
Selecting power conservation settings	56
Storing a battery pack	56
Disposing of a used battery pack	56
Drives	57
Drive care	57
IDE drive light	58
Hard drive	59
Optical drives	62
Inserting an optical disc	63
Removing an optical disc (with power)	64
Removing an optical disc (without power)	65
Avoiding standby or hibernation	66
Multimedia	67
Multimedia Hardware	67
Using the optical drive	67
Identifying the installed optical drive	67
Inserting an optical disc	68
Removing an optical disc (with power)	69
Removing an optical disc (without power)	70
Using media activity hotkeys	71
Using the audio features	72
Using the audio-in (microphone) jack	73
Using the audio-out (headphone) jack	73
Using S/PDIF digital audio (select models only)	73
Adjusting the volume	74
Using the video features	75
Using the external monitor port	75
Using the S-Video-out jack	76
Remote Control (Select Models Only)	77
HP Mobile Remote Control (PC Card version)	77
Inserting the battery (PC Card version)	78
Storing the remote control in the PC Card slot	80
Button quick reference (PC Card version)	81
HP Mobile Remote Control (PC Card version) component functions	84
HP Mobile Remote Control (ExpressCard version)	85
Inserting the battery (ExpressCard version)	85
Storing the remote control in the ExpressCard slot	87
Button quick reference (ExpressCard version)	88
HP Mobile Remote Control (ExpressCard version) component functions	91
Troubleshooting the remote control	91
Multimedia software	92
Identifying preinstalled multimedia software	92
Installing multimedia software from a CD (select models only)	92
Using multimedia software	93
Protecting playback	94
Protecting the CD or DVD write process	94
Changing DVD region settings	95
Observing the copyright warning	95
External Media Cards	97
Media Reader cards (select models only)	97
Inserting a digital card	98
Stopping or removing a digital card	99
PC Cards (select models only)	100
Configuring a PC Card	100
Inserting a PC Card	101
Stopping or removing a PC Card	101
ExpressCards	103
Selecting an ExpressCard	103
Configuring an ExpressCard	103
Inserting an ExpressCard	104
Stopping or removing an ExpressCard	106
External Devices	107
Using a USB device	107
Connecting a USB device	107
Stopping a USB device	108
Required USB software	108
Using a 1394 device (select models only)	109
Connecting a 1394 device	109
Stopping a 1394 device	109
Required 1394 software	109
Using the expansion port	110
Memory Modules	111
Adding or replacing memory modules	111
Effects of increasing memory	115
Video memory settings (select models only)	116
Wireless (Select Models Only)	117
Wireless features	117
Identifying an 802.11 wireless device	117
Wireless controls	118
802.11 wireless devices (select models only)	119
Setting up a WLAN in your home	120
Connecting to a WLAN in your home	121
Connecting to a public WLAN	121
Using wireless security features	121
Bluetooth wireless devices (select models only)	122
Wireless device status states	123
Turning on the devices	124
Turning off and disabling the devices	125
Modem and Local Area Network	127
Modem	127
Connecting the modem cable	128
Connecting a country-specific modem cable adapter	129
Selecting a location setting	129
Viewing the current country selection	129
Adding new locations when traveling	130
Solving travel connection problems	131
Using preinstalled communication software	132
Local area networks	133
Security	135
Security features	135
Passwords	136
Guidelines for setting passwords	136
Passwords set in Windows	137
QuickLock	137
Passwords set in the Setup Utility	138
Administrator password	138
Managing an administrator password	139
Entering an administrator password	139
Power-on password	139
Managing a power-on password	140
Entering a power-on password	140
DriveLock password	141
Setting a DriveLock password	142
Entering a DriveLock password	143
Changing a DriveLock password	143
Removing DriveLock protection	144
Device security	144
Antivirus software	145
Firewall software	145
Critical updates	145
Optional security cable	146
Setup Utility	147
Setup Utility access	147
Setup Utility language	148
Setup Utility defaults	149
Setup Utility menus	150
Main menu	150
Security menu	150
Advanced menu	151
Tools menu	151
Software Updates and Recovery	153
Software updates	153
HP Software Update	153
Software updates and the HP Web site	154
Accessing computer information	154
Downloading a BIOS update	155
Installing a BIOS update	156
Downloading and installing other software	157
System recovery	158
Safeguarding your information	158
Using System Restore	158
Creating a restore point	158
Restoring to a restore point	159
Reinstalling applications	159
Reinstalling applications from the hard drive	159
Reinstalling applications from discs	159
Repairing the operating system	160
Reinstalling the operating system	161
Back up your system	161
Reinstall the operating system	162
Reinstalling device drivers and other software	163
Update reinstalled software	163
Routine Care	165
Hardware maintenance	165
Battery pack	166
Disposing of a used battery pack	166
TouchPad and keyboard	167
Display	167
Drives	168
Using Disk Defragmenter	168
Using Disk Cleanup	168
Regular tune-ups	169
Traveling and shipping	170
Troubleshooting	171
Quick checklist	171
The computer will not start up.	171
The computer screen is blank.	172
The software is functioning abnormally.	172
The computer is turned on, but is not responding.	173
The computer is extremely warm.	173
An external device is not working.	173
The computer cannot connect to a wireless local area network (WLAN).	174
Customer Care	175
Preparing to contact Customer Care	175
Contacting Customer Care by e-mail or telephone	175
Taking the computer to a service partner	175
Electrostatic discharge	177
Preventing electrostatic discharge	177
Handling drives	177
Handling internal components	177
Grounding methods	178