1) Try entering the BIOS, restoring default settings, then Save & Exit.
2) Try swapping drive bays with your HDD to see if the SSD is recognized.
3) If that fails, remove the SSD from the laptop, install it in a USB Drive Enclosure and see if it can be accessed from another computer, even a desktop. If you gain access, backup any important files and run SSDLife to confirm the drive is healthy.
If the SSD remains inaccessible, say some kind words and bury it in the backyard...
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT