The input voltage exceeds the norm (during power surges).
The transformer is faulty.
The microwave oven was not used correctly.
How to test a magnetron:
Remove the device by disconnecting the terminal and unscrewing the four screws.
Place the multimeter probes on the magnetron contacts.
If the resistance on the screen shows zero, then the cause is a short circuit.
The defective part is replaced with a new element.
Noise and hum . Checking the fan and transformer will help to fix the problem. Make sure that the back of the appliance is properly ventilated, move it away from the wall.
A multimeter is also used to diagnose a transformer. It is necessary belgium telegram data to measure the resistance on the primary and secondary windings.
Disconnect the contacts from the windings.
Place the probes on the connector or winding contact.
If one of the windings shows zero, this is a consequence of a short circuit (SC).
In this case, the entire transformer is replaced.
The microwave oven does not turn on . Check the voltage in the socket. Connect another device to it. If it works, inspect the power cable. It should not be bent or melted. If damage is visible, the cable must be replaced.
Make sure the chamber door closes tightly. A broken lock or microswitch means that the control board does not give a signal to turn on. Because it is unsafe to heat with the door open. If there is a malfunction, a new mechanism is installed.
The pan does not rotate . It is also necessary to disassemble and inspect the wiring from the engine to the pan. Tighten the contacts and connections. If the engine breaks, the unit must be replaced.
Now you know how to repair your LG microwave oven yourself. Follow our recommendations and don't forget to follow safety precautions.