Has a solution ever been found. New machine arrived yesterday. And loaded up my project in Premiere Pro CC2014 to find a white screen in the program monitor as described above. I do have an install of CS6 too so sounds like I should go back to that for now... but would be great to find a solution. Windows 7 machine with i7 quad core, 16GB RAM, and two AMD R5 240 (oem) 1GB cards installed.
Cheers,
Don