My Sharp R-1850/R-1851/R1852 appears to have blown a fuse. The carousel, light and panel function. I heard a loud pop and the microwave will not heat up any more. I would like know where the fuse is and where I can purchase one.

J.C., January 2009

A fuse probably has blown, but it is an internal part. This means it is a job for a properly trained microwave oven repairer, who would not simply replace the fuse, but make tests to find out what caused it to blow. You are clearly not such a person, so do not attempt to carry out a repair. You could make the problem worse, as well as putting yourself in danger.

Jim Garrod, February 2009