Question about Panasonic Microwave Ovens

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Nn 5485c Panasonic microwave has power but shows #77 on start up....keypad does not work on any button

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  • William Miller
    William Miller May 11, 2010

    The first thing to try is a "hard reset". Unplug it from the power line for a few minutes, plug it back in, set the clock, then try again.

    Let us know if the hard reset doesn't fix it.

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  • Panasonic Master
  • 8,820 Answers

It may be a bad keypad. Maybe the "7" pad is shorted.

Posted on Jun 29, 2008

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You may have a failed keypad or moisture or grease on the keypad innards or on the control circuit board itself.
You can find a video here that shows you how to remove the grille & controller in about 5 minutes if it's an over the range model.
You can order Panasonic parts from Encompass here http://tinyurl.com/7qy85y or you can call them toll-free at 866-779-5835.

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The first thing I would suggest is a hard reset. Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

Let us know if the hard reset does not fix it.

You may have a failed keypad or control board.

We repair these for customers nationwide with our guaranteed $39.95 service.

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

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