Lack of update is because of lack of time to try the new PSU.
Installed it last night, same issue...
The plan now is to build a completely new machine. Using that I'll be able to test to see if any my current components are functioning in the hope of getting some money back.
Creating a spec me thread now, thanks for the help guys!
Probably a daft question now, but did you try a different hdd, cable and reinstall the OS with the latest drivers?