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. 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 the 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. 193nNTroubleshooting Mouse What should I do if my computer does not recognize my mouse? . Make sure your mouse is securely plugged into the port. . Restart your computer with your mouse connected. What should I do if the pointer does not move when I use my mouse? . Make sure another mouse is not connected. . If the pointer does not move while a software application is running, press the Alt+F4 keys to close the application window. . If the Alt+F4 keys do not work, press the Windows key once and then the , key several times, select Restart with the M or m key, and press the Enter key to restart your computer. . If your computer does not restart, press the Ctrl+Alt+Delete keys, select the arrow next to the Shut down button with the m and , keys and then Restart with the M or m key, and press the Enter key to restart your computer. . If this procedure does not work, press and hold the power button until the computer turns off. ! Turning off your computer with the power button may cause loss of unsaved data. 194nNTroubleshooting Speakers What should I do if my external speakers do not work? . 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. . Make sure your speakers are properly connected and the volume is turned up loud enough to hear sound. . Make sure your speakers are designed for computer use. . If your speakers have a muting button, set the button to off. . 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. . If your speakers require external power, make sure the speakers are connected to a power source. See the manual that came with your speakers for more information. . 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 200). 195nNTroubleshooting 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 progra...

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