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Sony VGN S400 Series, VGN-T300 Series What should I do if the brightness of the screen changes?, What should I do if the external display (or TV) does not display anything?

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Troubleshooting

What should I do if the brightness of the screen changes?

The brightness of your screen when adjusted with the Fn+F5/F6 keys is temporary and this adjustmen t is overridden by the

setting on the VAIO Power Management tab when another power schem e is selected.

To save this preference for the brightness

✍

To do the following procedure, you must have administrator rights.

1Click Start and then Control Panel.

2Click Performance and Maintenance.

3Click Power Options.

4On the Power Schem es tab, select the desired power scheme from the Powe r scheme s list.

5On the VAIO Power Management tab, select No change under Plugged in and Running on batteries for LCD Brightness.

6Click OK.

The preference for the brightness adjusted with the Fn+F5/F6 keys is saved and your screen brightness remains unchanged

regardless of operating conditions.

What should I do if the external display (or TV) does not display anything?

If you change the log-on user with the Fast User Switching function after your computer started, you will not be able to select a

display by pressing the Fn+F7 keys.

Contents

Main Contents Page Page Page Before Use Documentation Printed Documentation Non-printed Documentation Ergonomic Considerations Page Getting Started Locating Controls and Ports Take a moment to identify the controls and ports shown on the following pag es. VGN-S400 Series models Front Page Page Right Left Page VGN-T300 Series models Front Page Page Right Left Bottom Getting Started About the Indicator Lights Indicator Functions Connecting a Power Source Using the AC Adapter To use the AC adapter Using the Battery Pack Installing the Battery Pack Page Charging the Battery Pack To charge the battery pack Page Page VGN-T300 Series models Shutting Down Your Computer Safely To shut down your computer Using Your VAIO Computer Page Using Your VAIO Computer Combinations and Functions with the Fn Key Combinations/Feature Functions Page Using the Touch Pad Using Special-function Buttons VGN-S400 Series models Using Your VAIO Computer Special-function button Functions Using the Optical Disc Drive To insert a disc Page Reading and Writing CDs and DVDs Notes on writing data onto a disc Notes on playing DVDs Playing CDs To play an audio CD Copying Files to CDs To copy files to a CD-RW or CD-R Playing DVDs To play a DVD Copying Files to DVDs (on Selected Models Only) To copy files to a DVD-R or DVD-RW Using PC Cards Inserting a PC Card Page Page Removing a PC Card To remove a PC Card Page Using the Memory Stick Media Write-protecting a Memory Stick Media Inserting a Memory Stick Media To insert a Memory Stick media using the Memory Stick media slot Viewing the Contents To view the contents Formatting a Memory Stick Media To format a Memory Stick media Removing a Memory Stick Media To remove a Memory Stick media using the Memory Stick media slot Using the Internet Setting Up a Dial-up Internet Connection To connect a telephone cable To set up a dial-up connection to the Internet Using Wireless LAN (WLAN) Page Page To communicate without an Access Point (ad-hoc) Page To disconnect from a computer-to-computer (ad-hoc) network Page To connect to a wireless network To disconnect from a wireless network Wireless LAN Channel Selection (a) With an Access Point ("Infrastructure") (b) Without an Access Point ("ad-hoc") Using the Bluetooth Functionality (on Selected Models Only) To connect to a Bluetooth device Notes on using the Bluetooth functionality Bluetooth Security Page To communicate with another Bluetooth device To transfer data from or to another Bluetooth device To connect to a network with Bluetooth device Page Using Peripheral Devices Connecting a Port Replicator Locating Ports on the Port Replicator Port replicator for VGN-S400 Series models Port replicator for VGN-T300 Series models Attaching Your Computer to the Port Replicator Page Page Page Disconnecting Your Computer from the Port Replicator Page Connecting External Speakers To connect external speakers Connecting an External Display Connecting a Computer Display To connect a computer display Connecting a Multimedia Computer Display To connect a multimedia computer display Connecting a Projector To connect a projector Selecting Display Modes To select a display Models with the Intel video controller Models with the NVIDIA video controller Using the Multiple Monitors Function Page Models with the NVIDIA video controller Connecting an External Microphone To connect an external microphone Connecting a Universal Serial Bus (USB) Device Connecting a USB Mouse To connect a USB mouse Connecting a USB Floppy Disk Drive To connect a USB floppy disk drive Disconnecting a USB floppy disk drive To disconnect a USB floppy disk drive Connecting a Printer Connecting a Printer Using the USB Port To connect a printer using the USB port Connecting a Printer Using the Printer Port To connect a printer using the printer port Connecting an i.LINK Device Notes on connecting i.LINK devices Connecting a Digital Video Camera Recorder To connect a digital video camera recorder Connecting to a Network (LAN) Page Page Setting the Password Adding the Password To add the password Changing/Removing the Password To change or remove the password Customizing Your VAIO Computer Setting Up Your Computer with VAIO Control Center To use VAIO Control Center Control item Description Page Changing the Performance Setting (on Selected Models Only) Using the Power Saving Modes Using Normal Mode Using Standby Mode To activate Standby mode To return to Normal mode To change the Standby mode settings Using Hibernate Mode To activate Hibernate mode To return to Normal mode Page Page Activating VAIO Power Management To activate VAIO Power Management To restore the default settings Activating VAIO Power Management Power Schemes To activate a VAIO Power Management power scheme Page VAIO Power Management Viewer Upgrading Your VAIO Computer Adding and Removing Memory Notes on adding/removing memory modules Page Removing and Installing a Memory Module Page Page To change or add a memory module to the memory module underneath the keyboard Page Page Page Page Page Page Page Page Page Page Viewing the Amount of Memory To view the amount of memory Precautions On Handling the LCD Screen On Using the Power Source On Handling Your Computer Page On Handling Floppy Disks On Handling Discs On Using the Battery Pack On Using Headphones On Handling Memory Stick Media On Handling the Hard Disk To avoid damaging your hard disk Troubleshooting Computer What should I do if my computer won't start? What should I do if a BIOS error appears when my computer starts? If the message "Press <F1> to resume, <F2> to setup" appears at the bottom of the screen Page Page What should I do if my computer or software stops responding? Why won't my computer enter Standby or Hibernate mode? To restore the computer to normal operating stability , Page Why is the sound of my computer's fan so loud? To lower the CPU speed using the power schemes Why does the System Properties window display a slower CPU speed than the maximum? Why don't my changes appear on the computer screen (LCD)? Page What should I do if I cannot use my computer as a VAIO Media server? To use your computer as a VAIO Media server Why does it take time before my computer starts? System Security How can I protect my computer against security threats, such as viruses? To use the Automatic Updates feature To visit the Windows Updates web site How do I keep my preinstalled antivirus software updated? To download and install the latest security update Battery Why doesn't my computer enter Hibernate mode? Internet Why doesn't my modem work? Why is my modem connection slow? Networking Why can't my computer connect to a wireless LAN access point? Why can't I access the Internet? Why is the data transfer speed slow? How do I avoid data transfer interruptions? What are channels? When I change the encryption key, the network connection stops. What should I do? Bluetooth Technology Why can't other Bluetooth devices discover my computer? Why can't my computer discover other Bluetooth devices? Why can't I find the Bluetooth device with which I want to communicate? Why can't other Bluetooth devices connect to my computer? How will I know when another Bluetooth device is requesting authentication? Why is my Bluetooth connection slow? Page CDs and DVDs Why does my computer freeze when I try to read a disc? What should I do if the drive tray won't open? What should I do if the optical disc drive isn't playing my CD or DVD properly? What should I do if I cannot write to CD? What should I do if I cannot write to DVD? (on selected models only) Display Why did the computer screen (LCD) go blank? What should I do if the screen does not display a video? What should I do if the screen is dark? What should I do if the brightness of the screen changes? To save this preference for the brightness What should I do if the external display (or TV) does not display anything? Printing Why can't I print a document? Page Mouse What should I do if the computer doesn't recognize the mouse? What should I do if the pointer doesn't move when I use the mouse? Speakers Why won't my speakers work? Why can't I hear sound from my speakers? Touch Pad What should I do if the touch pad does not work? How do I change the left and right button assignments? 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 Why doesn't the Safely Remove Hardware icon appear on the taskbar when the drive is connected? Why is the drive unable to write data to a floppy disk? PC Cards Audio/Video Why can't I use the DV camera recorder? Memory Stick Media Why can't I open my image files? Why can't I save music files onto my Memory Stick media? Can I copy images from a digital video camera using Memory Stick media? Peripherals What should I do if I cannot connect a USB device? Support Options Sony Support Information For users in Latin American countries or areas Customer Information Center Page Program Support Information