Question about LG LMVM1935 Convection/Microwave Oven
My LMVM1935Sb is plugged in, there is a light in the microwave when you open the door. Screen shows the correct time. However the keypad, the Light and the Vent Fan button are non-responsive. Is this a bad circuit board or possibly a fuse? (I tried the parental lock trick and that did not work.)
This model does have a child lock. If it's on, the display will say "LOCKED". It is turned on and off by holding dfown the "0" key for 4-5 seconds. You may also have a bad keypad, which in many cases can be replaced. A bad keypad may be worn out due to age, damaged, or it may have gotten wet or otherwise contaminated. Moisture and contamination can be caused by spraying of cleaners, by storing the microwave in an unheated garage or shed, or infestation. I warn my customers to never spray cleaner directly onto the microwave keypad, since the liquid can get inside and "lock up" or even ruin the keypad or controller. Apply an alcohol-based cleaner (such as the purple kind) to a cloth (paper towels can scratch) and gently wipe it off. I suggest to my customers that they NEVER use any ammonia-based cleaner (like the blue stuff) on a microwave, since the ammonia will crack and distort polycarbonate plastics. Repost if you need more help.
Posted on Nov 05, 2006
Heat the keypad with a hair dryer. The problem is generally moisture. After a minute or two or three of heat, the keypad works. Did so on a Sharp, Panasonic and Black & Decker.
Posted on Jun 12, 2012
Keypad quit working on similar LG model. Buy replacement keypad for $30 at repairclinic.com. Turn off power, remove two screws on top. Take top cover off. Remove control panel on right via two screws (it folds down on two plastic tabs at bottom. Remove two wires, wire harness (has clip on back) and remove control panel. Keypad ribbon is removed from circuit board by pulling up on sides of black connector. That slips up lock on ribbon allowing ribbon to be removed. Keypad is stuck to face with sticky stuff so remove at face by peeling off corners and pulling loose. Replace is opposite of installation.
Posted on Aug 16, 2010
Posted on Oct 31, 2012
My micro oven model no.MS-2342AE
Micro oven start button on key pad is not working please let me know how to set it right
Posted on Jun 24, 2008
I have LG MICROWAVE MODEL NO MC 7647UL IT SHOWS E10 PROBLEM AND TOUCHPAD IS NO WORKING PLS GUIDE ME HOW TO REPAIR IT
Posted on Sep 06, 2012
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.
Posted on Jan 26, 2008
If you might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved.
It's at http://www.microwavedisplay.com/keypad_replacement.pdf
We're happy to help and we appreciate your thoughtful rating of our answer.
Posted on Jun 23, 2008
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