Blown fuse replaced, still no power
Sounds like either your replacement fuse is bad or perhaps it is not fully screwed in.  First thing, try another new fuse.

While you are replacing it, visually inspect the connection.  You are looking for burns or other debris.

The other possibility is that he overloaded the circuit to the point where a connection or wire failed somewhere.  If you have a non-contact voltage tester handy, I would verify that there is voltage being detected on the wire directly outside of the panel for that circuit. If there is power here but not at the outlet further downstream then you will need to find out where the failure point is by tracing the circuit and testing it at several locations.  If there is no power being detected immediately after the panel then the bad/failed connection might be in the panel itself.

Your best bet might be to call an electrician to help you out. This type of scenario can be dangerous and indicate poorly terminated wires or incorrectly sized wires.