Solved and all working now. My mistake in setting the wrong FID in the P state section, based on the CPU speed being displayed there. In the process forgetting its the FID x BCLK that gives the actual CPU speed. So in setting A0 as FID (which then displayed 4ghz in the P state freq window), then BCLK as 110, in actuality I was attempting to boot a 4.4ghz overclock..no wonder it wouldn't boot !