I recently bought a home and the stove was included in the package. However, 3 of the 5 burners do not work. Is there an easy fix for these things? The stove is in good condition otherwise-- no cracks, stains, etc. I'm wondering if there is a fuse we can replace, if it's worth having someone else come fix it, or if there is something else we can try on our own. Any help is much appreciated!