So the lights on my speedometer are not working (yes I checked the dimmer switch

). All of the signal, hight beams, check engine and so on lights. The lights on the a/c and rear window defroster buttons still work but not the lights on the on the 3 air control knobs and the lights around them. I’ve checked the fuse and it's been blown. First i thought "hey it's an old fuse so I’ll just replace it”, well the replacement fuse blew. So what could be the possible problems and solutions? I really need to know because when I drive at night I don't know how fast I’m going.
oh yeah and i have a 97 CE V6 5spd and my radio still works if that helps.