Time to bake…a logic board! Hoping this will revive my dead MacBook.
This seems the best way to respond to the comments…reblog my own post…
@noimdead - lots of weird behavior; video artifacts, spinning beachball of death, etc. Logic board shorting itself out due to tin “whiskers” in the chipset seemed the likeliest cause. The baking was an effort to “reflow” the circuits.
@itsallaboutthefreedom - I have a heat gun, but thought the oven would give a more even heat. Turns out it didn’t work. Will be pulling the board again and trying the gun. I did get 8 years out of this beasty (or pretty heavy use), so pretty content either way.