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Board symptoms- No sign of life at all. No shorts on any 5V-3V3 S5, S3, S0 rails. No fan spin even when attempted SMC bypass. G3H voltage 13.23V. Draws about 1 watt from wall in regular or SMC bypass mode.
in the process of measuring voltages I realized that u7200 gets very hot and board now draws 3w and doesn't have green light. I might have tapped two pins together to cause this but I will replace U7200 and update after.
edit: replaced u7200. board not booting same as before but u7200 not getting hot anymore so I assume my touching two pins shorted u7200. green light is back.
Voltages on new u7200-
16- 13.4v
3- 4.2v
8- 0.03v
17- 13.4v
1- 0.01v
6- 3.7v