I was trying to get it so i had dual monitors from the laptop to the tv and when i plugged the AV cable in i got a pop up and being the idiot i am, i made it so my TV was the primary. its not allowing me to change it back to my laptop being the primary screen.
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Check the manual for your laptop's model (which you didn't list). There is usually a way to control the monitor selection with the keyboard Fn combo.