Tried installing this last night into my new altima and got no sound. It worked perfectly before All the wires seem to be connected right, the display shows it counting seconds as if the songs are being played. Checked the manual and it said push reset button, still nothing. I noticed something about it might not work in japanese cars, but the model number on the manual isn't the same as the unit itself. Also the antenna cord won't fit the back of it either. Anyone have any ideas?