I have two, My Book World 2's—one is working fine and the other is not. I swapped the drives in them and it seems the casing for one of the units has gone back.
When I power it up, I see just the bottom segment of the lights light up; occasionally the just the top segment lights up (while the bottom segment stays on). I can't mount the unit/drives or access it from the browser (as stated above, putting the drives in the other unit works fines—moving the drives from the good unit to this one doesn't work).
Is there a way to diagnose what's happening?