Recently we had a strange problem arise. No one can connect to any wireless AP's in the office. Users do not have any firewall options at all on, and even my laptop which is not part of their domain, can no longer connect. I tried changing the wireless security types, passwords, rebooted the unit, unpluged the unit etc.
I even got a same make, different model WAP, same issue. I then grabbed a trusty DLink DGL4300 that works fine. Without any wireless encryption we can connect, but this is risky of course. Adding any wireless encryption and no user can connect. I tried different channels too, still can see the WAP, never can connect.