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Repair and disassembly guides for Kenmore Microwaves.

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My microwave just stopped working.

Kenmore 405.72122310. No power when I went to use it. Outlet is working. Husband THINKS it MIGHT be the transformer. I don’t want to spend money on something he THINKS might be the problem!

Didn’t know what pics you needed. First is the power board, second is the transformer and third is an up close of the transformer info label. Thought you might be able to glean some info from that, but it appears to be very blurry. Let me know if you need additional pics.

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Here are several pics of the power cord hookup. Hope they help. If you need any more, let me know. I REALLY appreciate all the time spent on this ;)

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Have you been able to see the pics I submitted? Do you have any more solutions? Husband is ready to trash this; he's extremely frustrated.

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@dianesplace in your pictures where does the power cord come in from? That is the only are I still would need to see.

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@dianesplace any signs of life on this? Interior lights, keypad anything? If it is totally dead it's more than the transformer. In all honesty, those transformers do not have a high failure rate. I'd be more inclined to say its a fuse or the power board.

Update (02/19/2020)

@dianesplace since microwaves are pretty dangerous to people getting zapped, you will not find a lot of repair manuals etc. online. Remember that the transformer and the capacitor on the inside pack a powerful punch, so make sure you proceed with caution. Most commonly the power supply/distribution is part of the control panel etc. We would need to see more of your MW so see if you can post some pictures. Once you remove the control panel, you should have a clear view of the parts in question. For a countertop MW it is best to remove the out cabinet. If it would be the transformer, your MW would still show life. Same with the magnetron etc. It would not be completely dead.

Adding images to an existing question

Update (02/23/2020)

@dianesplace check the fuse first for continuity (MW unplugged and off). After that plug it in and see if you have power on the fuse. One lead of your multimeter on the fuse and the other lead on the white cable. Set your meter to something like 200VAC scale. Check that power board for obvious damage as well. Once you determined that you have power going in you will have to check power coming of that board. You can most likely do that by testing on the wires leading away from it.

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Nope, no life at all. This puppy was working one day and deader than a doornail the next. Husband said it's not a fuse, but I tend to think he didn't really think that was the issue. Not sure about the power board; where is that located? Can't find any schematics at all for this thing!

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Have you been able to see the pics I submitted? They are attached to my original post/question. Do you have any more solutions? Husband is ready to trash this; he's extremely frustrated.

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Finally got husband to FIX microwave. It was just a matter of replacing the three fuses in the control section behind the number pad. Has worked fine ever since.

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Just an FYI....I found this video on YouTube that was extremely helpful.

Microwave Oven Repair - How to Test Fuses and Switches by GuruBrew. It was originally posted on Aug 7, 2015. Hope it can be found and it helps others like it did for me.

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Mine has a ceramic fuse you replace then it works.

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