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Sony VPCZ2 What should I do if my computer cannot connect to a wireless LAN access point?

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Troubleshooting >

Networking (LAN/Wireless LAN)

What should I do if my computer cannot connect to a wireless LAN access point?

❑Connection capability is affected by distance and obstructions. You may need to move your computer away from

obstructions or closer to any access point you may be using.

❑Make sure the WIRELESS switch is on and the WIRELESS indicator light is lit on your computer.

❑Make sure power to the access point is on.

❑If you want to connect your computer to a wireless LAN access point using the 5 GHz band, make sure the option to use

the 5 GHz band or both the 2.4 GHz and 5 GHz bands is selected for Wi-Fi Settings in the VAIO Smar t Network settings

window. Wireless LAN communication (IEEE 802.11a standard) using only the 5 GHz band, available on selected models

only, is disabled by default.

❑Follow these steps to check the settings:

1Click Start and Control Panel.

2Click View network status and tasks under Network and Internet.

3Click Connect to a network to confirm that your access point is selected.

❑Make sure the encryption key is correct.

❑Make sure Maximum Performance is selected for Wireless Adapter Settings in the Power Options window. Selecting

any other option may result in a communication failure. To change the settings, follow these steps:

1Click Start and Control Panel.

2Click System and Security and Power Options.

3Click Change plan settings for the current power plan.

4Click Change advanced power settings.

5Double-click Wireless Adapter Settings and Power Saving Mode.

6Select Maximum Performance from the drop-down list.

Contents

Main Contents Page Before Use How to find specifications Finding More about Your VAIO Computer 1. Printed Documentation 2. On-screen Documentation 3. Support Web Sites 4. Customer Information Center 5. In Store Service & Support (available in USA only) Ergonomic Considerations Page Getting Started Locating Controls and Ports Take a moment to identify the controls and ports shown on the following pages. Front Page Page Right Left Bottom (with the battery pack) Bottom (without the battery pack) About the Indicator Lights About the Indicator Lights Your computer is equipped with the following indicator lights: Indicator Functions Connecting a Power Source Using the AC Adapter To use the AC adapter Page Using the Battery Pack Installing/Removing the Battery Pack To install the battery pack Page To remove the battery pack Page Charging the Battery Pack To charge the battery pack About the use of an extended battery pack Checking the Battery Charge Capacity To check the battery charge capacity Extending the Battery Life Shutting Down Your Computer Safely To shut down your computer Using the Power Saving Modes Using Sleep Mode Using Hibernate Mode To activate Hibernate mode To return to Normal mode Keeping Your Computer in Optimum Condition Updating Your Computer Using the Antivirus Software for Your Computer Using the VAIO Care To launch the VAIO Care Using Your VAIO Computer Using the Keyboard Combinations and Functions with the Fn Key Using the Keyboard Combination/Feature Function Changing the Backlit Keyboard Settings To change the backlit keyboard settings Page About the touch pad zone Using the Touch Pad To use the touch pad zone Using Special-function Buttons Using the Quick Web Access Function Activating the Quick Web Access Function To activate the Quick Web Access function Exiting the Quick Web Access Function Notes on Using the Quick Web Access Function Using the Built-in Camera To make a video call using Windows Live Messenger To display images from the built-in camera Page Page Using the Optical Disc Drive Supported Discs Using the Optical Disc Drive Notes on Using the Optical Disc Drive Notes on writing data to a disc Notes on playing discs Page Playing Discs To play a disc Copying Files to Discs To copy files to a disc Using "Memory Stick" Before You Use "Memory Stick" Inserting and Removing "Memory Stick" To insert "Memory Stick" Page To remove "Memory Stick" Formatting "Memory Stick" To format "Memory Stick" Page Notes on Using "Memory Stick" Using Other Modules / Memory Cards Using the SD Memory Card Before you use the SD memory card To insert an SD memory card To remove an SD memory card Notes on Using Memory Cards General notes on using the memory card Notes on using the SD memory card Using the Internet Using the Network (LAN) Using the Wireless LAN Notes on Using the Wireless LAN Function General notes on using the wireless LAN function Note on the data encryption Starting Wireless LAN Communications To start wireless LAN communications Stopping Wireless LAN Communications To stop wireless LAN communications Using the Wireless WAN Inserting a SIM Card To insert a SIM card Page Page Starting the Wireless WAN Communications To start the wireless WAN communications Using the International Roaming Service Using the BLUETOOTH Function BLUETOOTH Security Page To communicate with another BLUETOOTH device Page Notes on Using the BLUETOOTH Function Page Using the GPS Function To use the GPS function Using Fingerprint Authentication Registering a Fingerprint To register a fingerprint Page Page Logging Onto Windows To log onto Windows Using the TPM Important Notice Notes on encrypting the operating system or program files Notes on encrypting key files or files on the Personal Secure Drive Notes on encrypting backup files or other files Page Configuring the TPM To enable the TPM in the BIOS setup screen To install the Infineon TPM Professional Package To initialize and configure the TPM Using BitLocker Drive Encryption with the TPM Notes on using BitLocker Drive Encryption To unlock the encrypted data with a recovery key stored on a USB flash memory device Page Using Peripheral Devices Using the Noise Canceling Headphones Before You Use the Noise Canceling Headphones Page Connecting the Noise Canceling Headphones To connect the noise canceling headphones Adjusting the Effect of the Noise Canceling Function To adjust the effect of the noise canceling function Using the microphone directivity function To enable the microphone directivity function What to do if the balloon does not appear To display the balloon message Using Peripheral Devices > Connecting a Docking Station Connecting a Docking Station Locating Ports on the Docking Station Using Peripheral Devices > Connecting a Docking Station Connecting the Docking Station to Your Computer To connect the docking station to your computer Page Page Disconnecting the Docking Station from Your Computer To disconnect the docking station from your computer Page Connecting External Speakers or Headphones To connect external speakers Connecting an External Display Connecting a Computer Display or a Projector To connect a computer display or a projector Page Connecting a TV with an HDMI Input Port To connect a TV to your computer Page To play Blu-ray 3D Disc media To connect a high-quality digital sound output device between your computer and a TV Selecting Display Modes To select a display mode with the Fn+F7 keys To select a display mode from the display settings Using the Multiple Monitors Function To use the Multiple Monitors function Connecting a USB Device To connect a USB device To charge a USB device Notes on connecting a USB device Customizing Your VAIO Computer Setting the Password Setting the Power-on Password To add the power-on password (machine password) To add the power-on password (user password) To change or remove the power-on password (machine password) To change or remove the power-on password (user password) Setting the Windows Password To add the Windows password To change the Windows password To remove the Windows password Using the VAIO Control Center To use the VAIO Control Center Using the VAIO Power Management Selecting a Power Plan To select a power plan To change the power plan settings Selecting Graphics Modes About Graphics Modes with Graphics Accelerators Selecting the Graphics Mode Manually To select the graphics mode manually Precautions Safety Information Computer Power Source Battery Pack Headphones Care and Maintenance Information Computer LCD Screen Built-in Camera Discs Handling Your Computer Page Handling the LCD Screen Using the Power Source Page Page Using the Battery Pack Handling "Memory Stick" Handling the Built-in Storage Device To avoid damaging your built-in storage device Using Fingerprint Authentication Using the TPM Troubleshooting Page Computer Operations What should I do if my computer does not start? What should I do if the green power indicator light turns on but my screen remains blank? What should I do if my computer or software stops responding? Why doesn't my computer enter Sleep or Hibernate mode? To restore your computer to Normal mode What should I do if the charge indicator light is blinking fast and my computer does not start? Page Why doesn't my screen turn off after the automatic turn-off time has passed? How can I change the boot device order? Why doesn't the VAIO logo appear when I turn on my computer? System Update / Security How can I find important updates for my computer? How do I schedule the installation of Windows updates to my computer? Recovery / Recovery Media How can I create Recovery Media? How can I restore my computer system to its factory default settings? How can I reinstall the original software and drivers? How do I check the volume of the recovery area? How do I reduce the volume of the recovery area? Page Partition How can I create a hard disk partition? Battery Pack Can my computer enter Hibernate mode while running on battery power? Why can't I fully charge my battery pack? Built-in Camera Why does the viewfinder show no images or poor-quality images? Why is the video input from the built-in camera suspended for a few seconds? Why are captured images poor in quality? Page Networking (LAN/Wireless LAN) What should I do if the VAIO Smart Network icon is not displayed on the taskbar? What should I do if my computer cannot connect to a wireless LAN access point? What should I do if I cannot access the Internet? Why is the data transfer speed slow? How do I avoid data transfer interruptions? What are channels? Why does the network connection stop when I change the encryption key? Wireless WAN What should I do if my computer cannot connect to the wireless WAN? BLUETOOTH Technology What should I do if other BLUETOOTH devices cannot find my computer? What should I do if I cannot find the BLUETOOTH device I want to communicate with? What should I do if other BLUETOOTH devices cannot connect to my computer? Why is my BLUETOOTH connection slow? Page Optical Discs Why does my computer freeze when I try to read a disc? What should I do if the disc does not slide out? What should I do if I cannot play a disc properly on my computer? Page What should I do if I cannot write data to CD media? What should I do if I cannot write data to DVD media? Page GPS Display Why did my screen go blank? What should I do if I do not see proper images or videos? What should I do if some items do not fit on the computer screen? What should I do if 3D images are not displayed on my 3D TV connected to the HDMI output port? Why doesn't my screen display a video? What should I do if my screen is dark? What should I do if the external display remains blank? Page Page Printing What should I do if I cannot print a document? Microphone What should I do if my microphone does not work? How can I prevent microphone feedback? Speakers What should I do if I do not hear sound from the built-in speakers? What should I do if my external speakers do not work? Touch Pad What should I do if the touch pad does not work? Keyboard What should I do if the keyboard configuration is wrong? What should I do if I cannot enter certain characters with the keyboard? Floppy Disks What should I do if I cannot write data to a floppy disk? Audio/Video How do I turn off the Windows startup sound? How do I change the sound output device? Page "Memory Stick" Peripherals What should I do if I cannot connect a USB device? Why can't I charge the USB device connected to the USB port that can supply power? Docking Station Trademarks Page Page Notice