When a fuse detects too much power running through a wire, a tiny piece
of metal inside the fuse will break, thereby stopping the power from continuing
to run through the wire.
When the top of the fuse is made of glass, many people think that they
can look at the metal piece inside and see if it is broken. THIS IS NOT
The best way to handle a suspected blown fuse is to simply replace it.
If the power comes back on, great! If it doesn’t, then you should
call an electrician who is good at troubleshooting.