sorry for the late respond but i not trying to boot from PXE any more.
i try to make it the first boot device and nothing change.
only two things that work is to create an offline repository and then run the boot - repair process
or
[SIZE=14px][FONT=UbuntuRegular][COLOR=#333333]copy GRUB from [/COLOR][/FONT][/SIZE][COLOR=#222222][FONT=Ubuntu Mono][SIZE=14px]EFI/ubuntu/grubx64.efi[/SIZE][/FONT][/COLOR][SIZE=14px][FONT=UbuntuRegular][COLOR=#333333] to [/COLOR][/FONT][/SIZE][COLOR=#222222][FONT=Ubuntu Mono][SIZE=14px]EFI/BOOT/bootx64.efi [as published in [URL=‘http://askubuntu.com/questions/380447/uefi-boot-fails-when-cloning-image-to-new-machine]’]here[/URL]] [/SIZE][/FONT][/COLOR]
but it will only boot from UEFI and not when i try to repair on legacy,
what i need and want to try is to install fresh copy on legacy and then upload it with FOG, then i will try to deploy it on another computer and see…
thanks Cadyfish and Tom
hope that this post will help others
Nir