Fujitsu Lifebook AH550 User Manual page 146

Problem Possible Cause
Unavailable The WLAN device has
network 
been deactivated or
connection disabled
(continued)
The computer to be
connected is turned off
RF interference from
Access Points or other
wireless networks
Wireless network
authentication has
failed
Incorrectly configured
network settings
Incorrect IP address
configuration
Possible Solution
Check if the wireless switch is turned ON. Also verify "Disable
Radio" is not checked in "Network setting" window.
Check if the computer to be connected is turned ON.
The use of identical or overlapping RF channels can cause
interference with the operation of the WLAN device. Change
the channel of your Access Point to a channel that does not
overlap with the interfering device.
Re-check your Network Authentication, Encryption, and
Security settings. Incorrectly configured security settings such
as an incorrectly typed WEP key, a misconfigured LEAP
username, or an incorrectly chosen authentication method will
cause the LAN device to associate but not authenticate to the
wireless network.
Recheck the configuration of your network settings.
This only applies to networks using static IP addresses. Please
contact your network administrator for the correct settings.
140 - Troubleshooting the WLAN