Hi, I am asking for a close friend. Recently we took out his old AX760i PSU to upgrade to a CM V1000 PSU and ensured there was no power cycling in the motherboard. After swapping the PSU he realised that the AX760i was a better fit for his case and put it back. The V1000 was never turned on. However, when he turned on the PC, it couldn't get past the bios screen into windows or would be stuck at the boot screen. When the ssd was taken out then the system could boot into windows. The sandisk ssd is to store data and did not contain any windows files and is about 5 or 6 years old. We've tried different sata plugs and different computers but the problem appears when the ssd is plugged into the PC. Other options we've tried was to plug in the ssd after booting into windows but the ssd was not detected in disk management or the bios.
Does anyone have any experience with this and any ideas on how to get the ssd working again? The ssd contains the entirety of his university work and he can't afford to lose the data in the ssd.