(well, modulo shipping. Probably about $20)
A Level I/Level II unit, bought 1.5 years ago. It just picked up and fully died. No burns or smoke. Just kablooey.
Might be as simple as "a wierd, one-off, fuse thing". But I'm not going to try diagnosing/fixing.
It's out of the one year warranty but the manufacturer/shipper offered me a new one at an almost decent price.
Picture of similar unit:
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