All of a sudden I come home from work, and boom, no light on the Extreme, and a whistling sound from the power cord to the router. Went to the Apple store. Checked the wires and, indeed, it was a router malfunction. Bought a new one. Wish I knew what happened to the old one. Had it for less than 2 years. Never had an Apple product crap out on me since my Apple IIe had to have a motherboard replaced (1984, I think). A little disappointing.