[DEC regulator bricks]
Note there is an internal fuse!
In my (limited) experience, that fuse only fails when there's some other
major failure in the brick (like some of the power semiconductors have
shorted).
And I can't remember the last time I replaced a fuse in a computer,
peripheral, or other electronic device and didn't have to replace some
other components at the same time. Fuses don't fail for no reason.
Anyway, let's find out if the problem is inside the brick or outside
before suggesting possible component failures.
-tony