Hi P.H.
I didn't read the entire post but I think this link may help:
Fixing the black screen after grub boot-up
http://community.linuxmint.com/tutorial/view/842
If that doesn't work try Googling the words "grub blank screen" or something similar
https://www.google.com/#q=grub+blank+screen
I didn't read the entire post but I think this link may help:
Fixing the black screen after grub boot-up
http://community.linuxmint.com/tutorial/view/842
If that doesn't work try Googling the words "grub blank screen" or something similar
https://www.google.com/#q=grub+blank+screen