Hi. Same as amyzed with my import. Ive just put in a bose double base unit and i really want to do sat nav now. Mine does same. Nissan sign.on start up. Then jap text. Then blank. I see from spursmaddave that the top sat nav hasnt got bottom jap buttens and small control pad thing in. Is this an aftermarket? If so...how much!? I dont mind spending a few hundred quid to get it sorted / replaced.