Question about Emerson MW8779W Microwave Oven

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Keypad doesn't work

MW8780SB, plug it in and everything lights up, makes a few beeps, and the clock blinks.  No keypad buttons fuction.  After about 10 seconds, one more beep, and a blank clock screen.  When door is open, the light comes on, and goes out when closing the door.  I got this microwave from a friend that complained of same problem.  It worked great for about 2 weeks, problem just started this morning for me.

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I found that the "Best Solution" above works better with contact cleaner. Also, make sure the microwave door is open before you remove the keypad assembly. It makes it much easier to re-install, because the door-latching mechanism won't get in the way.

Posted on Jun 24, 2008


I had the exact same problem with the exact same microwave. The fix is quite easy. Disconnect the microwave from power. Remove the cover. I had to use vice grips on 2 of the back screws. Some weird torx screw. Remove 2 screws holding touch panel assembly. Find the ribbon cable that connect the touch panel to the circuit card. Push down on the clips on the connector and pull up on the connector wedge to remove the ribbon cable. Clean the cable with some rubbing alcohol. Replace the cable. Push down on the wedge until it snaps. Reassemble insuring that you engage clips on the front of the cabinet cover on both the top and sides of the cover. Install all screws and plug in. Hope this helps. Blessings to all.

Posted on Feb 25, 2008

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Check control panel and clean the control circuit, any moisture is there clean the circuit. any dry solder is there check overall circuit and confor it ...door switches and sensors

Posted on Oct 28, 2007

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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Hopefully no one sprayed a liquid cleaner directly onto or near the keypad...

From page 23 of the owner's manual:

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Please write back with more details if you need further help.

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