This was unexpected.

(Probably some 40 year old caps releasing their magic smoke.)

@chockenberry Could be likely the flyback has shorted or something in the high voltage circuit has blown on the board with that much smoke.
@dmboyd @chockenberry Yeah that's a lot for just a cap.
@incanus @dmboyd @chockenberry I was thinking that too! How fast can you rip that case apart?