Strange behavior under power module

Good evening to all,

I am Luca and I have just received the pixhawk 3 pro. Connecting it to a 3DR power module (5.3V, 2.25Ah) I have obtained this strange behavior: if I connect and the power on the pixhawk directly with the power module the pixhawk doesn’t switch on and a little led on the telemetry start to flickering but if I connect the pixhawk first through usb and after to the power module the pixhawk power on and disconnecting the usb still remain on. Do you have some ideas about this behavior?

Thanks a lot in advance and congratulation for this new project.


Could you verify and/or post your wiring?
If you think there is a real hardware failure you can open a ticket and we will inspect/repair/replace the board.