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found this bit on an other mac board
''There are quite a few things that can be wrong for a board not to boot. You know you have 3.4V on G3Hot so that is a good start. I would next check to make sure the 3.3V supply is putting out 3.3V. It is a dual port device with the other half putting out 5V but 5V is not enabled until later in the power up sequence.''
now that brings my 3.0x v reading on pin#6 that should be 3.3v in to question
but what I do not know is if it powers up later like the 5v bit looks to do
of course if I am reading it right and IF he is correct about the 5 v power up sequence
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