Sony VAIO VPCX Series Operating Instructions Manual page 116

Troubleshooting >
Networking
❑ 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?
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.
Except US model_BGN
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
❑ 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.
(page 113) to change the settings.
(page 57).
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