"Security" on screen on my Nissan Primera 2.2 diesel 2005?

Recently had the fuse box replaced (and everything reprogrammed, keys included at local Nissan dealer), which cured strange heater, immobiliser problems I was having. One week later I am getting "Security" on my screen and nothing on the console works (heater, radio etc.). However, I am NOT immobilised. It is like a "false" reading. Has anyone got any clues as to what is going on? Is it a short somewhere? Any help much appreciated.