I broke my drivers because I was installing drivers for my RX 480 then my power went out,

I boot to blackscreen, how do I repair my drivers.

boot on USB iso manjaro live
open a terminal

sudo manjaro-chroot -a
pacman -Syyu
mhwd -li
mhwd -r pci $(mhwd -li |grep ‘video-’ | awk ‘{print $1}’)
mhwd -a pci free 0300
mkinitcpio -P
update-grub
exit ( end chroot )