problem with Dashboard lights

[Thenissan]

Hi , The dashboard lights of my sentra is not working. When I start the car I see all the general indication lights come up. But when I switch on the head light, there wont be any light in dash board. Also I noticed that the light inside the raido also goes off when I turn on the head light. Is it because of some blown fuse. Which fuse bpx should I check? Can you guys suggest some ideas.