Question about LG LMVM1945 Microwave Oven

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Touch-pads unresponsive Intermittent prior problems have included light flickering on and off; carousel sometimes turning ... now, the entire touch pad set is unresponsive. Microwave has power (lights below and screen prompts for setting). Now, it reads "Locked" Thanks for any thoughts!

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Some newer models have a child lock feature which can be accessed via a HELP or CUSTOM HELP pad. On recent LG models, try pressing the "0" key for 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. Has anyone ever sprayed cleaner directly on the keypad? Has anyone ever boiled on the stovetop without running the hood vent fan? Is the hood vent clogged? Any of these can cause moisture buildup on the control circuit board or in the keypad, which can cause odd problems like this. 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 (since 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. Please let me know if I can help further: http://tinyurl.com/yzjozk

Posted on Sep 22, 2007

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We see this a lot. The problem is on the control panel, which we regularly repair nationwide for $39.95 postpaid.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

Details of our service and critical safety information and disassembly information is at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

We're happy to help and we appreciate your thoughtful rating of our answer.

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