Tried Blacknights 10.2.0 kernel with a stripped out lists of kexts, basically just the kernel, amd patch and chipset. Initial boot shutdown but I have tried -force64 -f -v and it has not got to what appears to be a preboot screen for OS X - ie a grey scrreen with cursor is here but it keeps flickering to a black screen.

I am now going to try the same install with the other kexts I normally use. Unless anyone else has a further input into getting this existing install booted?