power adapter quit

The 5W power adapter (A1205) on my 80GB iPod classic has quit working. The iPod itself still works. I take great care of the device and adapter - matter of fact, the adapter has never left my home (maybe once or twice when it was brand new, wayback when) and still looks like it is brand new - how is it possible that the adapter quit working? And, is it possible that it may be prudently fixed?