Why Is My Phone Display Not Working. Follow the setup instructions. Restart your iPhone or iPad.

Reboot Your Phone Press and hold the Power button to display the power menu then tap Restart if youre able. Allowing these permissions lets the Your Phone app display content from your device. These methods are divided into two parts - hardware methods and software methods.
Follow the setup instructions.
Press and release the volume up button. Firstly hold and press the power button to restart the Android phone then your phone may back to normal. As screen mirroring relies on Wi-Fi sometimes restarting it can resolve connectivity issues. Make sure your screen is clean and free of any debris or water.

