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Ok, so I put a new SMC (brand new), and still have all the same. There was only a little bit of spooge on C5021 & R5115-1 (no stuff). Fan spins, CPU gets hot, and ALL_SYS_PWRGD = 3.3V. I did try doing a PRAM reset with a new keyboard and cable (I don't have a usb keyboard). There was absolutely no other liquid or corrosion anywhere else on the board. Still no chime.
Think it is most prudent to take a known working SMC out of working MacBook to test. Will try this, then order another chip. That will narrow down the variables.