bar2jr2017 :
Have downloaded tool to USB thumb drive; installed in PC's USB slot, turned on PC. Screen still dark after 3 minutes. Should I wait longer to see something?
No, it should be instantly viewable.
Let's go back to the beginning...
Originally Win 8.1
Then upgraded to Win 10.
It was working fine after that?
Then....the HDD died? How did you determine this?
Insert SSD, and still the screen remains black?
This might not be a hard drive fail.
This s a desktop system?
Please list all the specs of this.