I had a Linksys BEFW11S4 B v1 router that I configured to be just a
WAP/wire switch to plug into my WatchGuard FW appliance. It finally got to
the point that I couldn't get to the Admin screens anymore and the wireless
went out on it even though I could plug a wire connection into it an the
machine could access the Internet and other machines on the Linksys and the
WG. That was after four years of being a router and then a WAP at the end
being on 24/7 365.
The things do go defective and maybe your device has gone defective sooner
than you have anticipated. It does happen. If it's under warrantee, you may
want to get a replacement, if you cannot get it to work. The 11S4 hit the
trash can. ;-)
You may also want to look into a Belkin voltage regulator/w battery backup
to keep the power clean and constant if you have not done so. These types
of devices routers and WAP(s) don't like spikes on the lines from household
appliances and will go quick if not protected. I am not talking about a
surge protector laying on the floor plugged into a wall outlet.
You may also want to talk to Belkin's Tech Support, but I think the WAP may
be gone.
Duane