The microwave part stopped working-it sounds terrible and electricity sparks are flying. NOTHING inappropriate was put into it before this started happening. I realize that it is a 15 year old microwave/hood combo, I have had them work longer, and we use them alot. Please help me fix it. My leftovers are piling up in the fridge!

Microwave Ovens - Goldstar - MV-1526 Microwave Oven