Radio Reception Quit

I have a 2001 Nissan Quest SE. About a week ago I was driving along and the FM/AM recption just quit working. The CD/Tape/VCP all work fine. it has lost all reception whenever you hit seek or scan it does not stop on a radio station it is like the antenna is gone.

Nothing was touched or moved under the dash. All fuses check out good. Does anyone have any ideas????

Check antenna connection on the back of the radio(head) unit. Also check the antenna connection at the exterior mounted antenna.