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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 137) 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 > Bluetooth Technology n141 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 n142 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 141). . 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 band, with which Bluetooth devices or wireless LAN devices work, is used by various devices. Although Bluetooth devices use the technology to minimize radio interference from other devices that use the same band, such radio interference may cause slower communication speeds and shorter distances or communication failures. . If a version of a Bluetooth standard employed on the Bluetooth device with which you want to communicate is not the same version as the one employed on your computer, the communication speed becomes slower. . High-speed communications between your computer and Bluetooth devices are available when they are compliant with Bluetooth Core Specification Version 3.0 High Speed (HS). For the high-speed communications, enable both the wireless LAN and Bluetooth functions on the computer. ! Some Bluetooth profiles do not support high-speed communications. Troubleshooting > Bluetooth Technology n143 N Why can't I use the services supported by the connected Bluetooth device? Connection is only possible for services also supported by the computer with the Bluetooth function. See Windows Help and Support for more information. Can I use a device with Bluetooth technology on airplanes? With Bluetooth technology, your computer transmits a radio frequency of 2.4 GHz. Sensitive locations, such as hospitals and airplanes, may have restrictions on use of Bluetooth devices to avoid radio interference. Check with facility staff to see if use of the Bluetooth function on the computer is permitted. Why can't I use the Bluetooth function when I log onto my computer as a user with a standard user account? The Bluetooth function may not be available to a user with a standard user a...
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