1.Boot From Live-CD
2.Mount the Installed Disk to /mnt from root user
( Root Disk will be sda1 or mmcblk0p2 ,check the same using fdisk/gparted utility and change accordingly )
# mount /dev/mmcblk0p2 /mnt
# mount /dev/mmcblk0p1 /mnt/boot/efi
# mount --bind /proc /mnt/proc
# mount --bind /sys /mnt/sys
# mount --bind /dev /mnt/dev
3.Chroot to /mnt
# chroot /mnt
( Check internet connection "# ping google.com" ,if not check "# ping 8.8.8.8" ,if working run
# echo "nameserver 8.8.8.8" >> /etc/resolv.conf
)
# apt-get update
# apt-get install grub-efi-amd64
(Remove grub-common,grub2-common if errror , and then install grub-efi-amd64)
# grub-install /dev/mmcblk0
# update-grub2 (OR # update-grub)
# exit
4.Umount and Reboot
# umount /mnt/dev
# umount /mnt/sys
# umount /mnt/proc
# umount /mnt/boot/efi
# umount /mnt
# reboot