User Keyboard problems

[Jim]

One User has lost use of Keyboard on his home directory, If you hold a 
key down for about 5sec the character for that key will appear.
Went into the KDE /Control Center/Peripherals and settings for keyboard 
was the same as for  another normal working box.
Where is the keyboard controlled (file) from a users home directory ?
Holding down 'shift key' for 10 secs doesn't make any difference either.

The other three users on this same box has use of keyboard on their home 
directory.