92 Toyota Camry

MY DASH(INSTRUMENT PANEL) LIGHTS ARE NOT WORKING, AND AIR BAG LIGHT IS ON. I HAD A CAR STEREO INSTALLED( DONT KNOW IF THAT MATTERS) FEW HOURS LATER BECAME DARK NOTICED TAIL LIGHTS WEREN'T WORKING. FOUND BURNT FUSE AND REPLACED IT. WHEN INSERTING FUSE IT MADE A LITTLE SPARK, SHORTLY AFTER A LITTLE SMOKE CAME FROM FUSE BOX. DASH LIGHTS AREN'T WORKING NOW, AND AIR BAG LIGHT IS ON. CHECKED ALL FUSES THEY ARE ALL GOOD. I WOULD APPRECIATE ANY POSSIBLE OR PROBABLE REASON FOR PROPBLEM