It is the fact that in almost all areas - from electronics to mechanics, main after sales issues are led by a people that are only marketing managers or similar

It is the fact that in almost all areas - from electronics to mechanics, main after sales issues are led by a people that are only marketing managers or similar. So forget about any possibility of self maintenance, or it will be very limited. Their job is to make this unavailable, or hardly available with fee. If anbody can contradict these, please, light me up, that it isn't so...