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So I found something out, When I put my red multimeter probe on Pin 9 of U6990 and hook up charger, I get a pulse of PP3V42_G3H rail. SO that tells me the chip is trying to put 3.42V out but something is stopping it.
I did. It is fixed. There was a broken via right above Q7810 (3V3S5_VFB_R7270). Ran a wire from R7270 into a via to L7220 and now have a working machine. Holy smokes this was a tough board. But it is back in the chassis and running Sierra like a champ.