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Compaq Presario V5000 Notebook PC User Guide - Page 168

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. 158 Chapter 15 Troubleshooting ENWW

Section	Page
Notebook Tour	11
Components	11
Top components	12
Keys	12
TouchPad	13
Buttons and switches	14
Lights	15
Display components	16
Front components	16
Rear components	17
Right-side components	17
Left-side components	19
Bottom components	20
Wireless antennae (select models only)	21
Additional hardware components	22
Labels	23
Specifications	24
Operating environment	24
Rated input power	24
Expansion port input/output signals	25
TouchPad and Keyboard	27
TouchPad	27
Using the TouchPad	28
Using an external mouse	28
Setting TouchPad preferences	28
Keyboard	29
Hotkeys	29
Hotkey quick reference	30
Hotkey procedures	30
Display and clear system information (fn+esc)	30
Open the Help and Support Center (fn+f1)	31
Open the Print Options window (fn+f2)	31
Open a Web browser (fn+f3)	31
Switch the screen image (fn+f4)	32
Initiate standby (fn+f5)	32
Initiate QuickLock (fn+f6)	33
Decrease screen brightness (fn+f7)	33
Increase screen brightness (fn+f8)	33
Play, pause or resume an audio CD or a DVD (fn+f9)	33
Stop an audio CD or a DVD (fn+f10)	33
Play previous track or section of an audio CD or a DVD (fn+f11)	33
Play next track or section of an audio CD or a DVD (fn+f12)	33
Keypads	34
Using the embedded numeric keypad	34
Enabling and disabling the embedded numeric keypad	34
Switching key functions on the embedded numeric keypad	35
Using an external numeric keypad	35
Enabling or disabling num lock mode as you work	35
Power	37
Power control and light locations	37
Power sources	39
Connecting the AC adapter	40
Standby and hibernation	41
Standby	41
Hibernation	41
Initiating standby, hibernation or shutdown	42
When you leave your work	42
When a reliable power supply is unavailable	42
When using wireless communication or readable or writable media (select models only)	43
Default power settings	44
Turning the computer or display on or off	44
Using emergency shutdown procedures	44
Initiating or resuming from standby	45
Initiating or restoring from hibernation	46
Power options	47
Accessing Power Options Properties	47
Displaying the Power Meter icon	47
Setting or changing a power scheme	48
Setting a security prompt	48
Processor performance controls	49
Battery packs	50
Inserting or removing a battery pack	50
Charging a battery pack	51
Monitoring the charge of the battery pack	52
Obtaining accurate charge information	52
Displaying charge information on the screen	52
Viewing charge displays	52
Interpreting charge indicators	52
Managing low-battery conditions	53
Identifying low-battery conditions	53
Low-battery condition	53
Critical low-battery condition	53
Resolving low-battery conditions	54
When external power is available	54
When a charged battery pack is available	54
When no power source is available	54
When the computer cannot restore from hibernation	54
Calibrating a battery pack	55
When to calibrate	55
How to calibrate	55
Step 1: Charging the battery pack	55
Step 2: Discharging the battery pack	56
Step 3: Recharging the battery pack	57
Conserving battery power	57
Conserving power as you work	57
Selecting power conservation settings	58
Storing a battery pack	58
Disposing of a used battery pack	58
Drives	59
Drive care	59
IDE drive light	60
Hard drive	61
Optical drives	64
Inserting an optical disc	65
Removing an optical disc (with power)	66
Removing an optical disc (without power)	67
Avoiding standby or hibernation	68
Multimedia	69
Multimedia hardware	69
Using the optical drive	69
Identifying the installed optical drive	69
Inserting an optical disc	70
Removing an optical disc (with power)	71
Removing an optical disc (without power)	72
Using media activity hotkeys	73
Using the audio features	74
Using the audio-in (microphone) jack	75
Using the audio-out (headphone) jack	75
Using S/PDIF digital audio (select models only)	75
Adjusting the volume	76
Using the video features	77
Using the external monitor port	77
Using the S-Video-out jack	78
Remote control (select models only)	79
HP Mobile Remote Control (PC Card version)	79
Inserting the battery (PC Card version)	80
Storing the remote control in the PC Card slot	82
Button quick reference (PC Card version)	83
HP Mobile Remote Control (PC Card version) component functions	86
HP Mobile Remote Control (ExpressCard version)	87
Inserting the battery (ExpressCard version)	87
Storing the remote control in the ExpressCard slot	89
Button quick reference (ExpressCard version)	90
HP Mobile Remote Control (ExpressCard version) component functions	93
Troubleshooting the remote control	93
Multimedia software	94
Identifying preinstalled multimedia software	94
Installing multimedia software from a CD (select models only)	94
Using multimedia software	95
Protecting playback	96
Protecting the CD or DVD write process	96
Changing DVD region settings	97
Observing the copyright warning	97
External Media Cards	99
Media Reader cards (select models only)	99
Inserting a digital card	100
Stopping or removing a digital card	101
PC Cards (select models only)	102
Configuring a PC Card	102
Inserting a PC Card	103
Stopping or removing a PC Card	103
ExpressCards	105
Selecting an ExpressCard	105
Configuring an ExpressCard	105
Inserting an ExpressCard	106
Stopping or removing an ExpressCard	108
External Devices	109
Using a USB device	109
Connecting a USB device	109
Stopping a USB device	110
Required USB software	110
Using a 1394 device (select models only)	111
Connecting a 1394 device	111
Stopping a 1394 device	111
Required 1394 software	111
Using the expansion port	112
Memory Modules	113
Adding or replacing memory modules	113
Effects of increasing memory	117
Video memory settings (select models only)	118
Wireless (Select Models Only)	119
Wireless features	119
Identifying an 802.11 wireless device	119
Wireless controls	120
802.11 wireless devices (select models only)	121
Setting up a WLAN in your home	122
Connecting to a WLAN in your home	123
Connecting to a public WLAN	123
Using wireless security features	123
Bluetooth wireless devices (select models only)	124
Modem and Local Area Network	125
Modem	125
Connecting the modem cable	126
Connecting a country-specific modem cable adapter	127
Selecting a location setting	127
Viewing the current country selection	127
Adding new locations when traveling	128
Solving travel connection problems	129
Using preinstalled communication software	130
Local area networks	131
Security	133
Security features	133
Passwords	134
Guidelines for setting passwords	134
Passwords set in Windows	135
QuickLock	135
Passwords set in the Setup Utility	136
Administrator password	136
Managing an administrator password	136
Entering an administrator password	137
Power-on password	137
Managing a power-on password	137
Entering a power-on password	137
Antivirus software	138
Firewall software	138
Critical updates	138
Optional security cable	139
Setup Utility	141
Setup Utility access	141
Setup Utility language	142
Setup Utility defaults	143
Setup Utility menus	144
Main menu	144
Security menu	144
System Configuration menu	145
Diagnostics menu	145
Software Update and Recovery	147
Software updates	147
HP Software Update	147
Software updates and the HP Web site	148
Accessing computer information	148
Downloading a BIOS update	149
Installing a BIOS update	150
Downloading and installing other software	151
System recovery	152
Safeguarding your information	152
Using System Restore	152
Creating a restore point	152
Restoring to a restore point	153
Reinstalling applications	153
Reinstalling applications from the hard drive	153
Reinstalling applications from discs	153
Repairing the operating system	154
Reinstalling the operating system	155
Back up your system	155
Reinstall the operating system	156
Reinstalling device drivers and other software	157
Update reinstalled software	157
Routine Care	159
Hardware maintenance	159
Battery pack	160
Disposing of a used battery pack	160
TouchPad and keyboard	161
Display	161
Drives	162
Using Disk Defragmenter	162
Using Disk Cleanup	162
Regular tune-ups	163
Traveling and shipping	164
Troubleshooting	165
Quick checklist	165
The computer will not start up.	165
The computer screen is blank.	166
The software is functioning abnormally.	166
The computer is turned on, but is not responding.	167
The computer is extremely warm.	167
An external device is not working.	167
The computer cannot connect to a wireless local area network (WLAN).	168
Customer Care	169
Preparing to contact Customer Care	169
Contacting Customer Care by e-mail or telephone	169
Taking the computer to a service partner	169
Electrostatic Discharge	171
Preventing electrostatic discharge	171
Handling drives	171
Handling internal components	171
Grounding methods	172