If youre having problems streaming Netflix from your iPhone to the projector, the first step is to make sure youre not using AirPlay. It does not work with iPhones or iPads. Turning it off might resolve your problem. You also want to ensure the Netflix app is open and on while youre using the projector.

Why cant I play Netflix on my projector from my iPhone?

Why is Netflix not showing on the projector when streamed from my iPhone? HDCP compliance is the reason for this! It is the reason why a lot of devices are unable to stream Netflix onto a projector via HDMI cables and AV digital adapters.