Solved Samsung Laptop not booting from USB

Hi
I am a longterm linux user, planning to convert my secondary (Samsung) laptop to FreeBSD. I have download FreeBSD iso (FreeBSD-12.0-RELEASE-amd64-disc1.iso) and write over my USB by dd:
dd if=FreeBSD-12.0-RELEASE-amd64-disc1.iso of=/dev/sdb bs=1M
My primary (HP) laptop is booting from this USB but not secondary (Samsung) laptop. Samsung laptop first tries to load from USB then upon failing move to existing GRUB. I have been using 'dd' for creating bootable USB for many years and this method never failed. Do you have any clue that why Samsung laptop is not booting from USB?
PS: The laptop is detecting USB and showing in boot menu but not booting from it.
Regards
 
Yes, the procedure will be the same. However the image itself is different. Burning the ISO to a memory stick is something that's new for 12.0-RELEASE. I've also heard some people were having problems booting it with the ISO burned to an actual CD. So I suspect the new boot for the 12.0-RELEASE ISO images doesn't work in some cases.
 
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