Q: x

How do I reconnect my Apple wired keyboard which stopped working after shutting down my iMac?  I already disconnect the keyboard and reconnected it and restarted my computer a number of times and is still does not recognize the wired keyboard.  I prefer using the wired keyboard because I use the number keypad all the time.  My iMac and the keyboard are only a couple of months old.  This is my first Mac so I'm a little lost.