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Αναγνωριστικό άρθρου : S700023392 / Τελευταία τροποποίηση : 26/06/2012

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Follow the procedure below to troubleshoot wireless connection issues, including dropped connections, failed connections or low signal strength.
difficulty rating Difficulty rating:
Intermediate		 time needed Time needed:
15-30 minutes activity

NOTE: Because each of these steps represents a possible solution to this issue, try connecting to the wireless network and view Web sites using your internet browser after completing each step.

Check the physical Wireless switch

Verify the physical wireless switch is set to ON. Refer to the user's manual for instructions.
Wireless Switch
figure 1 - wireless switch

Check the wireless utility

Look in the taskbar for the wireless icon, and make sure it is switched on.  Depending on your VAIO model, a different wireless utility may be installed.  On most VAIO models, Wireless networking is either managed by Wireless Device Switch or by VAIO Smart Network.

Wireless device switch icon - Wireless Device Switch information
VAIO Smart Network icon - VAIO Smart Network information

For a typical configuration, the option "Enable 2.4 GHz Wireless LAN" should be selected.
If Bluetooth devices are not used, we recommend to leave it disabled.

Driver and utility reinstallation / updates

Reinstall the Wireless Lan Utility and Driver using the VAIO Recovery software.

NOTES:
If model-specific information is required to use the VAIO Recovery software, refer to the operating instructions supplied with the product.

If available, download and install wireless Lan-related updates from our downloads section.

Test the connection with another computer

If possible, test another computer on the wireless network.

NOTE: If another computer is successful, this will ensure the problem is not with the ISP, modem or router.

Turn off the power management setting for the WLAN adapter.

Access Device Manager
In Network Adapters, locate the Wireless Network Adapter.
Right-click and select Properties
select the Power Management tab
Unselect the option 'Allow the computer to turn off this device to save power' and click OK
Wireless Adapter Power Management
figure 3 - Wireless adapter properties

Repair the wireless connection.

Click on Start - move the mouse pointer over Network, right-click and select Properties
At the left side of the Network and Sharing Center, click on the task Diagnose and Repair
Network and Sharing Center
figure 4 - Vista Network and Sharing Center


Disable Internet Protocol Version 6 (TCP/IPv6).

In the Network and Sharing Center, click on View status for the wireless network connection.
In the connection status windows, click on Properties.
Unselect the option Internet Protocol Version 6 (TCP/IPv6) and click OK.
Disable IPv6
figure 5 - disable IPv6

Obtain IP and DNS addresses automatically

In the Network and Sharing Center, click on View status for the wireless network connection.
In the connection status windows, click on Properties.
Double click on Internet Protocol Version 4 (TCP/IP4).

Ensure Obtain an IP address automatically & Obtain DNS Server address automically is selected.

Image

Test the connection in safe mode with networking

Boot the computer into safe mode with networking and test the wireless connection in Internet Explorer.

NOTE: If the connection works in safe mode, the issue is likely caused by anti-virus or anti-spyware software. Configure the software properly per the manufacturer's instructions.

WARNING: If anti-virus or anti-spyware software has been removed or disabled to troubleshoot the issue, Sony recommends enabling or reinstalling it to prevent exposure to malicious software. Once the software is enabled or reinstalled, configure it properly per the manufacturer's instructions to allow the Internet or network connection to work correctly.

Verify the router's configuration

Check the WAN IP address of the router as per the manufacturer's instructions.

NOTE: If the router is not getting a WAN IP address, the issue is likely caused by a problem with the ISP.

WARNING: There is a risk of data loss. If a router has been specifically configured (PPPoe, DSL, MAC address filtering, security, etc...), the settings will be removed by resetting the router and it will have to be reconfigured.

Reset the router and/or modem per the manufacturer's instructions.
If available, install a firmware update for the router and/or modem. Check the manufacturer's Web site for updates and instructions.

Wireless interference

Check to determine if wireless interference is causing the issue.  Make sure there is no other electrical equipment nearby the wireless router or the VAIO.