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ok so u9000 not shooting out 3.3v but it does have input of 3.3v i check p1 and lcd_igpwr missing i check resistor r1984 it has no power and measures to around 81k
so i think pch is screwed.. i also run thermal and can see pch is very hot -like 75c normally i see around 50c
usb test usb does same thing.
interesting - in OS i booted. went to safari put on you tube watch video in full screen 15-20 minutes no problem. I exit full screen scroll up and down machine turn off.
no other history known. smc bypass is with power button extend press?