If your Fire TV is turning on and showing TV content instead of displaying HDMI 1 for your Neon content, follow these steps to resolve the issue."
Step 1: Access the home screen of your Fire TV. At the top right, next to home click on settings.
Step 2: Find "Display and sounds" and click on it.
Step 3: Find the "Power controls" option and click on it. Change it from "Home" to "Last input"
Step 4: Once you're here and it shows "Last input" selected, you are good to go back into HDMI 1 so you can access the Neon app from the firestick and your menu will appear back on your screen.
Now every time you turn on your TV it will automatically start on HDMI 1.