Apparently during the uninstall of the previous drivers a folder was missed. This was causing the black screen.
Using Driver Sweeper that folder was found and removed.
Also, and this took quite some digging on the web to find, you can't load AMD/ATI video drivers while in Safe Mode. This was causing the 'Failed to load detection driver' problem.
Got the folder removed which allowed me to get to Windows desktop. Then was able to load the drivers for the HD7970.