And, another response to myself . . .
I was able to wipe away some of the soot from the PCB, and it looks like the burned component is " L10 ", so it’s an inductor.
Using the version 3.0 schematic from tequipment’s link, L10 is shown. right next to C0. Great.
But next problem, there’s no rating shown for L10. How many mHenry? I don’t know. Is there a BOM I can find? Oh, and when I look at the actual PCB, capacitor C0 does not exist, even though it’s shown on the schematic, and is [size=150]not[/size] in the “optional” [size=150](选装其)[/size] area of the schematic. The search continues.