Step 4: The Fuse
NEVER USE A WIRE INSTEAD OF THE FUSE!
There is a reason why the fuse melted. If you replaced it and everything work, you are lucky, but most of the time other things gone wrong too and the fuse is only the indicator of a problem.
BEFORE replacing the fuse do the rest of the testing. It could be that the rectifier or the capacitor is broken and that this caused the fuse to melt. Good fuse, if that happened it did the job it was made for.