How do completely turn off internal display on mac?

[asiancorruption]

I can't turn off the internal display in favor for my external one of my 2015 mbp using terminal commands or the 'hot corners' trick. Can anyone clarify the process using the terminal command or give me another solution? 

sudo nvram boot-args="niog=1" , then restarting with display connected or disconnected doesn't stop the internal display from turning on

[PeachyUwUSenpai]

the only way to completely turn it off is to open the display and cut the ribbon cable

[The Sloth]

google must be difficult to use http://apple.stackexchange.com/questions/21729/how-do-i-turn-off-laptop-display-when-i-have-an-external-display

[YedZed]

15 minutes ago, Alaradia said:

the only way to completely turn it off is to open the display and cut the ribbon cable

Sounds like a plan