Run a repeatable comparison
- Start with the iPhone, iPad or Mac and the expected AirPlay receiver on the same intended network.
- Check whether both picture and audio play on the source device alone.
- Use a compatible control item to check discovery and output on the receiver.
- Retry the failing item and record whether picture, audio or both are missing.
Keep the symptom precise
If the receiver never appears, investigate discovery and network first. If the receiver appears and a different item plays, the app or title may have different output constraints. Record the exact app and item rather than assuming an account-wide problem.