This is related to the gimbal part, not to the camera itself (IMHO). The camera should first be powered up and further he can use any Android device with the CGO4 app to check the workability. Until this, there is no reason to try to kill the controller.Bitte daran denken, dass es zwei Versionen der CGO4 gibt. Eine für den H920 und eine für den H920+. Sie können nicht kombiniert werden.
If the camera was bought in the german market, very and very probably it's in a non-working stage. A market-specific rules.