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Why can't I use the Bluetooth devices when I switch users? If you switch users without logging off your system, the Bluetooth devices will not work. Be sure to log off before switching users. To log off your system, click Start, the arrow next to the Lock button, and Log Off. Why can't I exchange business card data with a mobile phone? The business card exchange function is not supported. 186nNTroubleshooting Optical Discs Why does my computer freeze when I try to read a disc? The disc that your computer is trying to read may be dirty or damaged. Follow these steps: 1 Press the Ctrl+Alt+Delete keys and click the arrow next to the Shut down button and Restart to restart the computer. 2 Remove the disc from the optical disc drive. 3 Check the disc for dirt or damage. If you need to clean the disc, see Handling Discs (page 154) for instructions. What should I do if the drive tray does not open? . Make sure your computer is on. . If the power supply to the optical disc drive is disabled by the VAIO Power Management, the substitute drive eject button on the optical disc drive will not work. Use the drive eject button located above the numeric keypad. It will take a while to eject the drive tray if the optical disc drive is not powered. . If the drive eject button does not work, click Start and Computer, right-click the optical disc drive icon, and select Eject. . If none of the above options work, insert a thin, straight object (such as a paper clip) in the manual eject hole near the substitute drive eject button. . Try restarting your computer. 187nNTroubleshooting What should I do if I cannot play a disc properly on my computer? . Make sure the disc is inserted into the optical disc drive with the label facing upward. . Make sure the necessary program(s) is installed according to the manufacturer's instructions. . If a disc is dirty or damaged, your computer will stop responding. Follow these steps: 1 Press the Ctrl+Alt+Delete keys and click the arrow next to the Shut down button and Restart to restart the computer. 2 Remove the disc from the optical disc drive. 3 Check the disc for dirt or damage. If you need to clean the disc, see Handling Discs (page 154) for instructions. . If you are playing a disc and cannot hear sound, do any of the following: . The volume may have been turned off by the button. Press the button once again. . The volume may have been minimized by the button. Press the button several times or keep pressing the button to turn up the volume loud enough to hear sound. . Right-click the volume icon on the taskbar and click Open Volume Mixer to check the settings. . Check the volume setting in the audio mixer. . If you are using external speakers, check the volume settings on the speakers and the connections between the speakers and your computer. 188nNTroubleshooting . Make sure the correct driver software is installed. Follow these steps: 1 Click Start and Control Panel. 2 Click System and Maintenance. 3 Click Syste...

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