hi all. i sent my avic f700bt to pioneer to be fixed as the screen went blank and no mater what i did i could not get it back. it was out of warranty so i was expecting to pay something. when i rang to check on it they said that the navi unit is faulty and needs to be replaced at the cost of 350 euros plus vat. im not going to bother get it fixed but i was wondering would all the other functions work with this part faulty? or dose anyone know where i can get one of these navi units cheap. i think the part number is CWX3641

thanks