Hello HanoKathy,
Thanks for that info and choosing the Apple Support Communities. If I understand correctly, you are having an issue with mirroring your iPhone to your Apple TV, as you get sound but no picture. To help with this issue, please make sure that the software on these devices is up to date, and also restart your Apple TV and iPhone. Then follow the steps in this Apple resource on issues with AirPlay.
Cheers!
Thanks for that info and choosing the Apple Support Communities. If I understand correctly, you are having an issue with mirroring your iPhone to your Apple TV, as you get sound but no picture. To help with this issue, please make sure that the software on these devices is up to date, and also restart your Apple TV and iPhone. Then follow the steps in this Apple resource on issues with AirPlay.
Update the iOS software on your iPhone, iPad, or iPod touch
Update Apple TV software - Apple TV User Guide
Restart your iPhone, iPad, or iPod touch
Restart Apple TV - Apple TV User Guide
Get help with AirPlay and AirPlay Mirroring on your iPhone, iPad, or iPod touch - Apple Support
Cheers!