l322 sat nav

just got in my car and the sat nav/stereo wouldnt go past the landrover logo and the led kept flashing on the button, did i do something wrong or do i have an intermitant fault ?
it seems ok now but as ive only had the car 4 days i am a little concerned has this happened to anyone else?
its a 54 plate 05 model vogue with touch screen nav.

Certainly Has to me I found I I giggled the wires around in boot (left hand side) then harmony restores itself. I know it's not a permanent cure but it works again !

Any body know ..can u put post codes into sat nav menu or is it only street names that it acepts also can you reprog it so it does not predict what your trying to type ?thanks