I've noticed a tend towards sealed power adaptors, instead o ones which can be opened to have a fuse changed.
The ones for our CHristmas tree lights seem to have blown a fuse, but there's no way I can open it up to find out. And I can't even work out whether its output is supposed to be 24V DC or AC - I presume the latter.
How are these things sealed, with some sort of plastic cement that will be impossible to break open?
Daniele