My Apple HDMI AV adapter can briefly mirror my iPhone screen to my TV but then the TV screen turns dark. It doesn’t maintain the connection. What’s going wrong?

Hey there, Pej5158!

Thanks so much for using Apple Support Communities.

Digital AV Adapters are such a great way to share content from your devices on that bigger screen. We're happy to give you a hand with this. You've posted from article: About Apple Digital AV Adapters for iPhone, iPad, and iPod touch This has some great steps to take if you have issues with the adapter.

Does this happen with other TVs?

If those steps don't do it, we'd recommend reaching out to Apple directly: Contact Apple Support

We hope this does the trick for you!

Cheers.