After a motherboard repair, the option to boot into manjaro has dissappeared

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Mod-edit: These steps could work if you used Grub as your bootloader.

1- recheck option on boot for USB iso manjaro

  • no secure boot
  • no fast boot
  • disks on AHCI
  • no csm
  • no legacy

create a profile Linux and windows in your UEFI

2 - you will have to go in chroot
with USB iso manjaro live
open a terminal

inxi -Mxa 
test -d /sys/firmware/efi && echo efi || echo bios
sudo efibootmgr -v
sudo parted -l ( check UUID /boot/efi )

if all UEFI ok ,
change disk letter sdX ( X=a, b,c ,etc) and -p N (N= 1 , 2 , 3 )
if nmve , it will be nvmeX -pN

sudo manjaro-chroot -a 
cat /etc/fstab ( check that UUID /boot/efi is ok )
efibootmgr -c -d /dev/sdX -p N -L "manjaro" -l "\EFI\Manjaro\grubx64.efi"
efibootmgr -v
exit ( quit chroot )

then reboot

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