Usually one would suspect the resistor however, it looks quite normal.
Then again the underside may be a different story. (possibly blown)
That would then leave the 3 terminal device, which, without any detail, impossible to say what it is.
Wondering what happened to the (looks like) missing heat sink.
Other side of pcb (track side) could give an indication.
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Have no idea what the hell AFU means either...save your shortcuts for texting your friends.