• ** REMEMBER! **The microwave can still shock you even unplugged!!

    ALWAYS discharge the high-voltage capacitor first if you even think your hands will come close to any HIGH VOLTAGE components.

    Jeff mentions this: Anything in the high voltage ( magnetron, capacitor, diode, wires to and from ):
    ...Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it.

    From Jeff's site: http://www.applianceaid.com/component-testing.php

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Samsung ME21H706MQG No Power


Premium Member
Jan 23, 2023
Model Number
1-5 years
My Samsung ME21H706MQG suddenly lost power a few days ago and after searching on the forum I found that I should replace the two ceramic fuses (I don't own a multimeter so I just replaced them both). This restored power to the microwave for a short time and after a few hours it is back to no power. I would appreciate any and all help. Thanks
I believe you have a bad door switch. When it closes when it shouldn’t, it will blow the main power fuse on the small filter circuit board. The primary switch is likely the culprit. It should have no continuity when the door is open and continuity when closed. Also depress the three switches and see if they feel different. Unplug the microwave for all of these tests.
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