DJI drone, after connecting the camera, no image is displayed, and the camera button on the phone screen is also unresponsive?

The following are the linking steps:

1) When leaving the factory, the remote controller and the aircraft have been linked and can be used after powering on. If you replace the remote control, you need to re-bind it before it can be used. Follow the steps below to bind:

2) First turn on the remote control and connect the mobile device. Then turn on the smart flight battery power and run the DJI GO app.

3) Select the "Camera" interface, click the remote control icon, and then click the "Remote Control Binding" button.

4) The DJI GO app displays a countdown dialog box. At this time, the status indicator light of the remote control flashes blue and a beep sound is emitted.

5) Use a suitable tool to press and release the linking button to complete the linking. After the linking is successful, the remote control indicator light will be solid green. The linking button and linking indicator light are located on the side of the aircraft.