If the microwave oven is not heated, there may be something wrong with the high voltage diode. A diode is a device that can help guide current in one direction and provide current to a magnetron. It is usually located behind the microwave front panel near the control equipment. If it burns out, the microwave oven will not generate energy to rotate the magnetron and heat food.

It may be the solution to the magnetron failure: when the magnetron fails, it will also blow the fuse, which may lead to other failures in the microwave oven. Unplug the power plug, remove the cabinet shell, safely discharge the high-voltage capacitor, and remove the magnetron to check whether the magnetron works.

It may be that the high-voltage fuse of the microwave oven is blown. Replacing the high-voltage fuse can solve the problem.