If you did not include a model # XXXXX your question please do on you second reply if possible,this helps us serve you faster.
can you get me a full model #? thanks Bryan
there are internal fuses in this but I cant bring up the diagrams, these fuses can be changed but if its more like a board they are no longer available, the fuses are usually behind the control panel. please read this warning before proceeding however,
The U. S. Consumer Product Safety Commission (CPSC) warns against do-it-yourself repairs of microwave ovens. Each year, on average, four people die from electrocution trying to repair their microwave ovens. Microwave ovens use high voltage which makes it particularly hazardous for consumers to remove the cover and touch electrical parts. The possibility for electrical shock from a microwave oven still exists even after the oven is disconnected from the power source. Should certain internal devices fail, even unplugged ovens can cause serious injury. The Commission strongly recommends that consumers have professionals repair microwave ovens because electrical appliances can be hazardous if consumers expose live electrical parts.
/!\ WARNING ELECTROCUTION HAZARD HIGH VOLTAGE Removing the cover of your microwave oven and touching an electrical part can kill you. Have a professional repair your microwave oven
if you do find a bad fuse Lowes usually has them , well wishes and be safe, thanks Bryan