OpenSuse crashed - big problem
 

For several months, I have been running OpenFoam on OpenSuse Leap 15.4, hosted on VMWare. It is a setup that I arrived at after trying lots of options, and it works great. However...

Last week I launched a simulation with a script that apparently had a problem. The whole PC crashed. When I restarted it and opened VMWare, OpenSuse came up in a rescue mode, with a 'grub rescue' prompt.

For two days, I investigated anything I could find to resolve the issue. While there were a lot of results, nothing that I tried would work. Many of the sites say that I should access grub files from the installation CD, but I downloaded the software. OpenSuse itself has forums, but they are very technical, and yielded nothing that I could use.

So I took my PC to a repair shop, where it is currently sitting. Conversations with the staff have not been encouraging. While I did make a snapshot of the OpenSuse installation with native facilities, it was before much of my recent progress. And, I am wondering, if I must re-install OpenSuse, would the snapshops still be there to use?

While I am not a sheepherder, I am also not a degreed computer scientist. I need an understandable set of steps to take to recover the OpenSuse installation from the 'grub rescue' mode. Has anyone experienced this situation?