Fujitsu E8420 E8420 User's Guide - Page 174

Problem Unavailable network connection (continued) Possible Cause The computer to be connected is turned off RF interference from Access Points or other wireless networks Possible Solution 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. Wireless network authentication has failed Re-check your Network Authentication, Encryption, and Security settings. Incorrectly configured security settings such as an incorrectly typed WEP key, a mis-configured LEAP username, or an incorrectly chosen authentication method will cause the LAN device to associate but not authenticate to the wireless network. Incorrectly configured network settings Recheck the configuration of your network settings. Incorrect IP address configuration This only applies to networks using static IP addresses. Please contact your network administrator for the correct settings. 169 - Appendix A: WLAN User's Guide