If the power tripped in the house - all the power - it would be an RCD trip rather than an MCB - Had an MCB tripped the fuse in the plug would have blown as well.
An RCD will trip when there's an inbalance of current between Live & Neutral the assumption being that the missing current is running to earth and possibly electrocuting someone - an unsafe condition.
It does no harm to check the wiring in the plug but new appliances come with moulded-on plugs so it may be difficult to do this. Had you been able to dismantle the plug to remove the fuse then presumably you would have inspected the plug wiring at the same time.
No LED on the front panel and a known-good AC supply and a known-good fuse suggests that the internal power supply that provides power to the control electroniocs is defective - no power here = no LED, no control and no function. Whatever the fault was that caused the trip has now created an Open Circuit because the trip is no longer operating. Something has melted.
Peccavi
February 2010