Are you using an iOS device? Mine will not always connect unless I unplug and replug the USB cable a few times and then it hooks up right. Might be an Apple issue or DJI issue, but multiple cables haven't helped. Happens with two separate drones and iPads here running 11.2.1. Sometimes I get a Disconnect screen, and other times it shows Ready to Fly in green, but it still is partially linked as some things in the About screen are missing and the C1 button will not trigger the camera down and up.