Problem | Possible Cause | Possible Solution | 
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Unavailable  | The WLAN device  | Check if the wireless switch is turned On. In Windows XP, go to Start   | 
network  | has been  | Settings   | 
connection  | deactivated or  | Connection. If Enable appear at the top of the menu, click it to enable  | 
(continued)  | disabled  | the device. In Windows Vista, go to Start   | 
  | click on Windows Mobility Center. If the wireless network is off, click the  | |
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  | |
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  | [Turn wireless on] button..  | 
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  | The computer to  | Check if the computer to be connected is turned ON.  | 
  | be connected is  | 
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  | turned off  | 
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  | RF interference  | The use of identical or overlapping RF channels can cause interference  | 
  | from Access  | with the operation of the WLAN device. Change the channel of your  | 
  | Points or other  | Access Point to a channel that does not overlap with the interfering  | 
  | wireless networks  | device.  | 
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  | Wireless network  | |
  | authentication has  | settings. Incorrectly configured security settings such as an incorrectly  | 
  | failed  | typed WEP key, a   | 
  | 
  | chosen authentication method will cause the LAN device to associate  | 
  | 
  | but not authenticate to the wireless network.  | 
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  | Incorrectly  | Recheck the configuration of your network settings.  | 
  | configured  | 
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  | network settings  | 
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  | Incorrect IP  | This only applies to networks using static IP addresses. Please contact  | 
  | address  | your network administrator for the correct settings.  | 
  | configuration  | 
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155 - Troubleshooting the WLAN