I have a LMVM 2055SW that started having the light in the microwave not turning on when the door opens. Then recently we noticed when turning on the microwave, there is a noise within the microwave, not the normal one and the light and carosel doesn't work. A little wack above the door handle caused the light to come on, the carosel to move and we hear the normal noise. Next time, the wacking doesn't work and I'm guessing one of the door switches. We tried unplugging and replugging the AC, and everything else works. Any ideas? Thanks in advance!!

SOURCE: No key's work. Display and inside light is working

The Keypad is either faulty, or disconnected. Open the case, and remove the screws, holding the outer shell on. Inside, there should be a small board that covers the Keypad. Check to see if there is a ribbon cable, or some other type of connection going from the board to another part of the microwave. If all of the wires are connected, then you will probably need to replace the keypad.

Ginko

• 19396 Answers
• Posted on Apr 27, 2009

SOURCE: Microwave Does Not Heat.

Test the high voltage capacitor,the rectifier diode.or the magnetron.

If it additionally does not spin and no light, then check also the door switch.

The diode and capacitors can br tested. The capacitor must be alloweddischarge before testing, or you risk to get electrocuted, even ifpower is off. Capacitors can get discharged by shorting their twocontacts.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.

All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts. (here in UK).

SOURCE: LG Microwave won't turn off

Our LG did the same thing - called customer service and they told us the open and slam the door 10 times. It actually worked! It reset the switches somehow.

SOURCE: Installation of magnetron

if you push the star button and no sound or anything comes from the unit then you have a bad user control. if you hit start and the machine starts working but not heating then i recommend replacing the magnatron capacitor and diode. use caution replacing these as the unit runs the mag with a 20,000 volt transformer

Testimonial: "WOW!! I can't believe someone answered so quickly. OK, can I replace the user control myself? If so, how. OMG you are awesome, thanks so much."