Question about LG LMVM2075 1000 Watts Microwave Oven

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Touchpad on LG Microwave Lmvm2075st

The display works but not all of the keys on the touchpad. Do I need a new circuit board?

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It could be the circuit board, or it could be the cable that attaches the keypad to the circuit board has come loose.

Posted on Dec 27, 2008

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testing every step and fix it. God bless you see the diagram attached

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If the microwave buttons don't work the touchpad and control panel assembly are probably defective.
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If the microwave buttons don't work the touchpad might be at fault. Generally speaking, if the dishwasher display is working and some of the buttons respond correctly but some don't, the problem is with the touchpad.
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If the microwave buttons don't work the user control and display board are most likely defective and will need to be replaced. If some of the buttons work and some don't, it is more likely a touch pad problem and the touch pad will need to be replaced.
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If the microwave buttons don't work the main control board is most likely defective and will need to be replaced. If some of the buttons work the touch pad is likely the problem. If none of the buttons work the problem may be in the main control board.1_24_2013_5_23_47_pm.gif1_24_2013_5_24_54_pm.jpg

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Touchpad and Control Panel


If the microwave buttons don't work the touchpad and control panel assembly are probably defective.
Touchpad


If the microwave buttons don't work the touchpad might be at fault. Generally speaking, if the dishwasher display is working and some of the buttons respond correctly but some don't, the problem is with the touchpad.
User Control and Display Board


If the microwave buttons don't work the user control and display board are most likely defective and will need to be replaced. If some of the buttons work and some don't, it is more likely a touch pad problem and the touch pad will need to be replaced.
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If the microwave buttons don't work the main control board is most likely defective and will need to be replaced. If some of the buttons work the touch pad is likely the problem. If none of the buttons work the problem may be in the main control board.1_24_2013_5_54_53_pm.gif1_24_2013_5_55_10_pm.jpg

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Touchpad and Control Panel If the microwave buttons don't work the touchpad and control panel assembly are probably defective.

Touchpad If the microwave buttons don't work the touchpad might be at fault. Generally speaking, if the dishwasher display is working and some of the buttons respond correctly but some don't, the problem is with the touchpad.

User Control and Display Board If the microwave buttons don't work the main control board is most likely defective and will need to be replaced.

Main Control Board If the microwave buttons don't work the main control board is most likely defective and will need to be replaced.
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My microwave keypad wont work the light is on and the reading says please touch clock and set time of dry


SEE THIS CAUSES AND FIX IT. God bless you
Touchpad and Control Panel If the microwave buttons don't work the touchpad and control panel assembly are probably defective.

Touchpad If the microwave buttons don't work the touchpad might be at fault. Generally speaking, if the display is working and some of the buttons respond correctly but some don't, the problem is with the touchpad.
ser Control and Display Board If the microwave buttons don't work the main control board is most likely defective and will need to be replaced.

Main Control Board If the microwave buttons don't work the main control board is most likely defective and will need to be replaced.

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see this causes and fix it. God bless you
Touchpad and Control Panel If the microwave buttons don't work the touchpad and control panel assembly are probably defective.

Touchpad If the microwave buttons don't work the touchpad might be at fault. Generally speaking, if the display is working and some of the buttons respond correctly but some don't, the problem is with the touchpad.

User Control and Display Board If the microwave buttons don't work the main control board is most likely defective and will need to be replaced.

Main Control Board If the microwave buttons don't work the main control board is most likely defective and will need to be replaced.

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Mar 27, 2012 | LG LMVM2075 Microwave Oven

1 Answer

LG lmvm2075st microwave control panel problems.


"On each panel the board surrounding the same diode is burned"?

Maybe that's a three-tap power relay, not a diode?

I'd be very interested in this and I have the service manual here which you can download.

Feel free to contact me directly (and please include your full model number from the tag in or on the unit) for a free estimate and free tips & do-it-yourself advice.

Also, if you can send me a photo of the burned area, that would be helpful.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Jan 30, 2010 | LG Microwave Ovens

1 Answer

We have an LG over the range microwave and boiling a pot of water on the stove apparently shorted out the key pad. The numbers don't work and the vent and light buttons work intermittently. Note that this...


We have an LG LMVM2075SB over the stove microwave that we purchased in December, 2007. A few weeks ago, several of the positions on the touchpad stopped working.

I assumed that the problem involved the touchpad itself. I ordered a new one (Part number MFM37134802 - $25.30 plus shipping), and we installed it today. This solved the problem.

J. Adams,Alabama

The installation was not simple. The door has to be removed and disassembled to enable you to get to the connector that connects the touchpad with a circuit board. We heated the old touchpad with a hair dryer and pulled it off (after disconnecting the connector). The new touchpad comes with an adhesive backing. You have to be very careful in placing it because the adhesive is very strong. The touchpad fits in an identation, so the placement of the new one must be perfect.

Failure of the touchpads on these LG models seems to be a common problem. It sounds like a design problem.

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