Rank: Master
Rating: 89%, 17 votes
Most likely the power capacitor is shorted.If you know someone that is just alittle familiar with electronics, they will know what to look for.The part will look like a somewhat long large silver 9v battery with two metal leads.Normally toward the back of the microwave and below the cooling fan.With a volt-ohm meter this capacitor can be checked.on the meter if you get a reading ,its bad, if you get no reading(open), its most likely good.Ninety percent of the time it will be bad.If it is, just replace with the same value and your ready to go.