It's good practice to shut down your screen when it's not in use. Same how you would shut down a computer or a TV when you're not using it, do the same with your LED screen. If your LED screen is powered, it is consuming some energy, and also the inside components are energized. So at the end of service or at the end of your day, it is good practice to go ahead and shut your screen off. There's no particular order when it comes to startup or shutdown of your screen. Your processor can be on, your computer can be on, and the LED screen can be on, whichever order makes sense to your start up procedures at your church. Most importantly, just at the end of your day, go ahead and shut those screens down so they're not consuming power and the internal components are not energized.