What up all.. I picked up a 8400 demo for 385 online after my 8200 was stolen.. navigation and android auto will not work. I called pioneer and soon as I said that when I press nav I get a loading igo, they told me its defective and need to be repaired, or i can try to reload the newest firmware. I'm going to try but wanted thoughts. Seller is willing to do a partial refund not sure how much yet.. any info greatly appreciated