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Stop video playback, change the display output to the computer screen, and then restart video playback. See Selecting Display Modes (page 82) for changing the display output. Alternatively, you can press the Fn+F7 keys to change the display output. See Combinations and Functions with the Fn Key (page 34) for more information. . The video memory of your computer may be insufficient for displaying high resolution videos. In such a case, lower the resolution of the LCD screen. To change the screen resolution, follow these steps: 1 Right-click on the desktop and select Screen resolution. 2 Click the drop-down list next to Resolution. 3 Move the slider up to increase or down to decrease the screen resolution. . You can check the total amount of the graphics and video memory available. Right-click on the desktop, select Screen resolution, and click Advanced Settings and the Adapter tab. The displayed value may be different from the actual amount of memory on your computer. How do I change the LCD brightness? Press the Fn+F5 keys or Fn+F6 keys to change the LCD brightness of your computer screen. See Combinations and Functions with the Fn Key (page 34) for more information. What should I do if my screen is dark? Blocking the ambient light sensor turns your screen dark. Make sure that the sensor is unblocked. Troubleshooting > Display n149 N Why does the LCD brightness change automatically? The LCD brightness of your computer screen changes automatically according to ambient light intensity that is measured by the ambient light sensor. To disable the automatic brightness settings, follow these steps: 1 Click Start, All Programs, and VAIO Control Center. 2 Click Display and Automatic Brightness Settings. 3 Click to cancel the Adjust brightness automatically check box. 4 Click OK. What should I do if the external display remains blank? Press the Fn+F7 keys to change the display output. See Combinations and Functions with the Fn Key (page 34) for more information. How do I run Windows Aero? To run Windows Aero, follow these steps: 1 Right-click on the desktop and select Personalize. 2 Select your desired theme from Aero Themes. For information about the Windows Aero features, such as Windows Flip 3D, see Windows Help and Support. Troubleshooting > Printing n150 N Printing What should I do if I cannot print a document? . Make sure your printer is on, and the printer cable is securely connected to the ports on the printer and your computer. . Make sure your printer is compatible with the Windows operating system installed on your computer. . You may need to install the printer driver software before you use your printer. See the manual that came with your printer for more information. . If your printer is not functioning after your computer resumes from a power saving mode (Sleep or Hibernate), then restart the computer. . If the bidirectional communication functions are provided with your printer, disabling the functions on your computer may enable printing. Follow these steps: 1 Click Start and Devices and Printers. 2 Right-click the printer icon and select Properties. 3 Click the Ports tab. 4 Click to cancel the Enable bidirectional support check box. 5 Click OK. This disables the bidirectional communication functions of the printer, such as data transfer, status monitoring, and remote panel. Troubleshooting > Microphone n151 N Microphone What should I do if my microphone does not work? . If you are using an external microphone, make sure the microphone is turned on and is properly plugged into the microphone jack on your computer. . Your sound input device may have been incorrectly configured. To configure the sound input device, follow these steps: 1 Close all open programs. 2 Click Start and Control Panel. 3 Click Hardware and Sound. 4 Click Manage audio devices under Sound. 5 On the Recording tab, select your desired device for sound input and click Set Default. How can I prevent microphone feedback? Microphone feedback occurs when the microphone receives the sound from a sound output device, such as a speaker. To prevent this problem: . Keep the microphone away from a sound output device. . Turn down the volume of the speakers and the microphone. Troubleshooting > Speakers n152 N Speakers What should I do if I do not hear sound from the built-in speakers? . If you are using a program that has its own volume control, make sure the volume control is properly set. See the program's help file for more information. . The volume may have been turned off by the Fn+F2 keys. Press them once again. . The volume may have been minimized by the Fn+F3 keys. Keep pressing the Fn+F4 keys to turn up the volume loud enough to hear sound. . Check the Windows volume controls by clicking the volume icon on the taskbar. . Your sound output device may have been incorrectly configured. To change the sound output device, see How do I change the sound output device? (page 157). Why is sound from the built-in speakers distorted? Depending...
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