Sorry, meant internal fuse, not the one associated with the power cord.
as you said, you have tested that.
first fault - there was a loud "pop" on night and the LED was completely extingushed. Fuse change by B&O Hanoi. Cost more to lump the thing to their workshop.
second fault - The LED blinked Red/off every second indicating a protection fault. That was a GBP250 chasis board change.
considering they are now 7 years old (IIRC) and have been to Indonesia, UK, Ghana, Turkey, Vietnam, Central Russia and UK again, I think they have faired rather well.
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