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Power shuts down when I hit start button. It shows "8888" on the screen.

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  • kranman22 Sep 23, 2009

    Maytag Microwave Model #MMV1153BAW. It will work sporadically but most of the time it just shuts down when I hit the start button. The clock goes blank also and has to be reset.

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What is the make and model?

Posted on Sep 23, 2009

  • Brad Brown Sep 23, 2009

    Microwaves are messy to work on. I dont mean physically but if you take it apart, you have to leak test it to be sure that it is not leaking microwave energy into the room. That being said with what you are talking about it is probably a bad diode or capacitor on the power supply. If I was you I would see about getting it repaired by a service center.

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1 Answer

Sharp R-9H84B-display black, cleared display shows "Conv Mix, 88:88 Auto". Short time all dark again. Hit clear happen 2 times then, all dark, no power, can't clear won't start, nothing works.


R-9H84B - May 29, 2017

I would suggest pulling the control board out and looking on the foil side (opposite the component side) for "ring cracks," most likely on the low voltage transformer's connections.

The board may have the screen-printed reference designator "T1" near the low voltage transformer.


ring_cracks-gr02aocewnccyez3v1hdhepo-1-0.jpg

Also be sure the fuse is not easy to turn with your fingertips when it is in the holder. If it is, the fuse holder is too loose and must be replaced (not just squeezed with pliers).

You can order a fuse holder, part number WB06X10034 for $6.49 (subject to change) from the Pros here.

If you have any keypad issues, please note that the membrane keypads for this model have long been discontinued.

FixYa does not directly notify us experts of responses, so if you have other questions, please contact me directly.

- William E. Miller, AS-EET
pupista@gmail.com
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

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Sumsung MU3250W shut down


The problem is your magnetron tube is leaking RF. The mag tube comes on 2-3 seconds after you hit start, and the RF interfears with the board and shuts it down. Drop the front of the control panel down and watch, it wont happen.. Get a new mag tube put in and you'll be good to go.

Oct 19, 2008 | Samsung MU3250W Microwave Oven

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The keypad control board must be replaced in order to address the issue, but keep in mind the part alone is expensive.

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It sounds like it could be just a bad crimp connector supplying power to the whole system, which would have to be the fuse holder on the mains input panel.
Worth a look!

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try gliding your fingers over the touch pad to see if any other buttons work , #8 is stuck, or shorted

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I PUT A POTATO IN FOR 6 MIN. AND AFTER ABOUT 2 MIN. IT SHUTS DOWN AND A MIN OR SO LATER IT STARTS UP AGAIN ,BUT THE TIME STILL COUNTS DOWN AND THE TURNTABLE IS STILL TURNING, AND YESTERDAY I HAD TO UNPLUG...


it sounds like it is overheating. but if only stops for a minute or so dont know if that would be enough time to cool off.When you start it up can you hear the fan running? does it keep running when it shuts down? if it's not running then thats the problem If the fan is running and shuts down when it shuts down then try shaking the door when you start it up the next time or you can try it the first time just to eliminate it being a faulty interlock switch. let me know about what you find about these two ideas.

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Sharp R-1750 shuts down.


The shutdown you're experiencing is separate from the control unit / display issue.

The shutdown is probably due to a a loose fuse holder, loose wiring, or a problem on the inverter board or the magnetron.

If the control unit doesn't receive the proper signals form the inverter, it will shut down the cooking process, but you say it acts like it's being unplugged - that makes me suspect a loose fuse or wiring.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person attempt to take readings on these inverters.

We actually have the service manual for this model and have uploaded it to our site here to help you.

You will need the free Acrobat Reader to view or print it in case you don't have it already.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

The best place to order Sharp parts is Tritronics. You can also call them at 866-779-5835.

If you get the shutdown problem repaired, we'd be happy to repair your display problem for you.

We regularly repair these control units for customers nationwide by mail for $39.95 postpaid in about a week with a one-year guarantee.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Nov 19, 2008 | Sharp R-1750 Microwave Oven

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