my sat nav works perfectly when i 1st get in the car, no problem at all... but if i stop, to go the shop/fill up with diesel for example and restart the car the sat nav screen is stuck... and it stays like that until i leave the car for an extended period (eg over night).

when i say the sat nav is frozen, i mean it's only the sat nav feature... the screen will still let me go in to 4x4 info mode and the touch screen still works.

anyone experienced similar?

and yes, i know the sat nav is somewhat dated now, and i mainly use my phone anyway, but it'd be nice for this just to work