Question about Microwave Ovens

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Sharp microwave R-1450 made buzz sound and shut down, no powere at all.

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  • lovemylattes Feb 07, 2010

    thank you. If the microwave is 16 years old, would you bother to do this or replace it?

  • lovemylattes Feb 07, 2010

    Quick response!!!

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  • Master
  • 11,896 Answers

First thing to do would be to remove the screws and pull off outter shell of the microwave. Then look inside to see if you fuse has blown. If the fuse is blown, replace it. If the fuse is still good, then you will want to get a multi-tester that has both volt and ohm settings. Then put tester on the voltage setting, find the power supply/high-voltage transformer (the box that has the power cord connected to it) Test the voltage from the supply/transformer to where it connects to the main circuit board. Write down the reading. Then look around the microwave to see if there is a sticker or label that says the DC Voltage Output rating. Make sure the number you wrote down matches this number. If it's not even close, then the supply/transformer is bad. If the numbers match or are very close, then you will want to use the tester in the ohm setting and test all the capacitors and see which one is not in range f4om the other ones.

Posted on Feb 07, 2010

  • Nate Stansfield
    Nate Stansfield Feb 07, 2010

    If it's just the fuse, then that's is a very cheap and easy fix, if it's anything else, just junk it and buy another.

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