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. Move your computer closer to the access point. . Make sure the access point connection is intact. . Change the access point channel. See the manual that came with your access point for more information. . 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. Follow the steps in What should I do if my computer cannot connect to a wireless LAN access point? (page 117) to change the settings. What are channels? . Wireless LAN communication uses divided frequency bands known as channels. Third-party wireless LAN access point channels may be preset to different channels from Sony devices. . If you are using a wireless LAN access point, see connectivity information contained in the manual that came with your access point. Why does the network connection stop when I change the encryption key? Two computers with the wireless LAN function may lose a peer-to-peer network connection if the encryption key is changed. You can either change the encryption key back to the original profile or re-enter the key on both computers so the key matches. Troubleshooting > Wireless WAN n120 N Wireless WAN What should I do if my computer cannot connect to the wireless WAN? . Make sure the battery pack is installed properly and charged. . Make sure the SIM card is 3G data enabled and activated by your telecom operator. When inserting the SIM card, be sure to follow the procedure in Inserting a SIM Card (page 55). . Your mobile phone network needs to cover your area. Contact your network provider for information on the network coverage. . Make sure the WIRELESS switch is on and the WIRELESS indicator light is lit on your computer. . Make sure the switch next to Wireless WAN is set to On in the VAIO Smart Network window. . You may need to manually enter Access Point Name (APN) information in your connection manager software. In such a case, make sure you have correct APN information from your telecom operator. See the help file included with the connection manager software for more information. . Check that your connection manager software has detected the wireless WAN modem successfully. It may take some time for the software to detect the wireless WAN modem. . For further information on the wireless WAN function, visit the VAIO support web site at regularly. Troubleshooting > Bluetooth Technology n121 N Bluetooth Technology What should I do if other Bluetooth devices cannot find my computer? . Make sure both devices have the Bluetooth function enabled. . Make sure the WIRELESS switch is on and the WIRELESS indicator light is lit on your computer. . You cannot use the Bluetooth function while your computer is in a power saving mode. Bring the computer back to Normal mode, then turn on the WIRELESS switch. . Your computer and the device may be too far apart. Wireless Bluetooth technology works best when the devices are within 10 meters of each other. What should I do if I cannot find the Bluetooth device I want to communicate with? . Check that the Bluetooth function of the device you want to communicate with is on. See the other device's manual for more information. . If the device you want to communicate with is already communicating with another Bluetooth device, it may not be found or it may not be able to communicate with your computer. . To allow other Bluetooth devices to communicate with your computer, follow these steps: 1 Click Start and Devices and Printers. 2 Right-click the Bluetooth device icon and click Bluetooth settings. 3 Click the Options tab and select the Allow Bluetooth devices to find this computer check box. Troubleshooting > Bluetooth Technology n122 N What should I do if other Bluetooth devices cannot connect to my computer? . Check the suggestions in What should I do if I cannot find the Bluetooth device I want to communicate with? (page 121). . Make sure the other devices are authenticated. . The data transfer distance can be shorter than 10 meters depending on existing obstacles between the two devices, on radio wave quality, and on the operating system or the software in use. Move your computer and Bluetooth devices closer to each other. Why is my Bluetooth connection slow? . The data transfer speed depends on the obstructions and/or the distance between the two devices, on the radio wave quality, and on the operating system or the software in use. Move your computer and Bluetooth devices closer to each other. . The 2.4 GHz radio frequency used by Bluetooth and wireless LAN devices is also used by other devices. Bluetooth devices incorporate technology that minimizes interference from other devices using the same wavelength, however, communication speed and connection range may be reduced. Interference from other devices may also stop communications altogether. . Connection capability is affected by distance and obstructions. You may need to move you...
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