Cooking the other day and heard pop sound and the microwave stopped working. I unplugged the unit and plug it back again; nothing happened, no lights, nothing. My first thought was the fuse, so a bought a new fuse and put it in. Microwave came back to life but for a short amount of time. The lights worked, the fan worked but the moment I hit "cook", I heard the same pop sound again and the fuse went out.