Sony PCG-GRV550 VAIO User Manual page 35

3.
Check the connection status.

Change the access point channel. See your access point instructions for more information.
Can I connect to a IEEE 802.11a device?
Computers with built-in wireless LAN support the IEEE 802.11b standard only. Devices connecting to a wireless LAN using
the IEEE 802.11a standard cannot connect to devices using the IEEE 802.11b standard.
What are channels?
Wireless LAN communication occurs on 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, refer to connectivity information contained in your access point instructions.
Page 35