A very common question among Fire TV Smart TV owners, formerly known as Fire TV Edition TVs, is if its possible for the TV to be powered on to something other than the Home screen, since most “dumb” TVs just show the last input you used when they turn on. Thankfully, the answer it’s yes and it’s the case for nearly all Fire TV Smart TV models, including those from AKAI, AmazonBasics, Croma, Grundig, HomeX, Insignia, JVC, OK, Onida, and Toshiba.
The only Fire TV Smart TV models that do not support this option are the original models released in 2017 by Element and Westinghouse. Fire TV Smart TVs from those brands can, unfortunately, only power on to the Home screen. The one other catch is for early Toshiba and Insignia Fire TV Smart TVs from 2018 that have never been online to update. The option to change how the TV powers on was added in 2018 with software update 220.127.116.11, so if your TV is running an older software version than that, you will need to connect it to the internet and allow it to update before this capability is available.
To change how the TV turns on, go to the Settings > Display & Sounds > Power Controls > Power On menu. From there, change the option to “Last Input” and the TV will always go to the last input that was used when it is turned on. There is no way to select a specific input to power on to everytime. To go back to the default behavior, just change the Power On option back to the “Home” setting.