To replace the fuse perform the same operation.
1.Power down the unit and unplug the power cable.
2. Use a small screwdriver to pry out the voltage selector cover.
3. Use same small screwdriver to pry the red voltage selector out.
4. Flip it, and make sure you remember correct voltage on top, if your machine is on 115V it should be 115V when you place it back.
5. Remove the fuse from the voltage selector
6. Carefully insert the new fuse.using your finger to push it in.
7. Carefully insert the voltage selector back into the socket. It should snugly fit in place but do not force it, as the contacts can be broken easily. Make sure it has the correct voltage on top (if it was 115V maintain it at 115V, if was 230V maintain it at 230V)
8.Close the voltage selector cover, make sure you can read proper voltage in the window and reconnect the power cable