The inspection found that the breakdown voltage diodes, high voltage fuse. After replacing these original power test machine, microwave oven still does not heat, but a few minutes after starting Shoumo magnetron metal casing hot. Magnetron suspected damage, then purchase another one and try to put the new magnetron machines, only to hear the microwave start "bang", and quickly outage inspection found that high-voltage diodes and breakdown. Due to the high pressure section before replacing the magnetron working properly, it was suspected a problem with the magnetron new purchase. Remove the magnetron measured with a multimeter, the filament resistance and insulation resistance were normal. After working properly replace the microwave magnetron.TeLservice manual download site