Lost grub and cant mount the HDD

[Ciudic]

hi , I need help solving this problem i have .
i lost my grub menu experimenting with ubuntu , i tried to reinstal it ,but i can't mount my HDD or any of it's partitions .
I am a new user to ubuntu,
please help , thanks

[YesWeCan]

Hi there. Let's see what your partitions are. Can you boot from live CD/USB and run:
sudo sfdisk -luS
and post the output here in code tags (highlight text and click # above)