Linksys wrt300n stops working when wireless is enabled

Linksys wrt300n. This unit worked fine when I left on a trip last week and sometime while I was gone, it stopped working. If I leave the wireless disabled, it works fine for my wired computers. If I turn wireless on, the router stops working for everything.

I have reset it, reapplied firmware and tried to shut off all computers except one to isolate to no avail. Any ideas appreciated.