The fuse box is an old school with the 15 amp and 20 amp screw in fuses. Everything else in the house works and I have changed it out a ouple of times with a fuse that does work what would be my next step?

Welcome

With a volt meter, check outlet nearest to fuse box that is not working.

Remove fuse and open outlet. Check wires in box for a break. Put fuse back in and check wires coming into box with volt meter. If circuit is good will read 120 across a black and white.

If not, remove fuse and go to next outlet. Repeat procedure.

If outlets are wired into stab holes on rear of outlet, move wires to screws to make sure connection is good.

Hope this helps. If not get back to us.

Chuck