Undo the four steel nuts
securing the Circuit board to
the metal panel.
Note the four washers on the terminal
posts. Take care not to lose these.
Locate the fuse on the front of the circuit
board (circled here in orange).
Using a small flat-tip screwdriver or similar;
carefully prise the fuse out, taking care not
to damage the fuse holder.
If you removed the four
washers when removing
the circuit board, replace
them now.
Replace the fuse by simply
pressing into the fuse
holder.