I was having an issue where everything is working except no video displayed on samsung tablet and same in iphone6 so I know its not software..I try to re update the firmware and it says firmware update failed and reboot aircraft and start over..What is wrong here?

Also I see the red button hidden on there, I cant find it in the manual what it is for..any ideas?

Check camera pins are not bent

Also when updating the firmwear make shore that the file on the USB drive are on the main directory and not in a sub file ,it will not find the file otherwise

Thanks ageelectrical, the pins are not bent but what I did was this..I took a piece of paper and rub the contacts, I use to work in an electronics shop assembly and I use to polish the gold contact with paper...When I attach the camera, all of the sudden the issue is fixed..It was the contact...So I would add this to monthly maintenance..I use alcohol and a scwab to clean it off