[GUIDE] How to unbrick a totally dead MBL

I have a dead-ish MBL - it goes to green light but can’t be seen on the network and the 1TB hard drive seems to have a corrupted partition table.

I’m currently running a scan using R-Linux and it’s picking up partitions, files etc. which is encouraging, but does this software actually rebuild the partition table and write it to the disk so the disk can then be used in its original state, or does it just recover data?

If it doesn’t automatically repair the partition table, is there another way to do this reliably?