I built WS and Installed Mint 18.03 a few years ago. Everything was working fine until now. The OS is installed in 250 GB SSD. We had power outage and one day after that I got message that GRUB is corrupted. I couldn't fix it so I purchase a new 1TB SSD HD. Used live DVD to install Mint 20. When Mint was loaded and installed I was asked to take out live CD and reboot. However newly installed OS couldn't be loaded. Even BIOS couldn't be loaded. I don't know what to do to fix that issue. Any help would be highly appreciated.