Hi
I have 2 phantom 3 professional it was working fine until I update to the latest firmware now I cannot complete the update or downgrade in the log text I got lion 8 and 15 device not detected help please I cannot send it back to DJI

Hello zakionline, if you see the 0800 and 1500 modules are not detected, it is recommended to get in touch with our tech support and send it to our service center for diagnosis. It is a hardware issue. Here is the contacting information: