Question about Microwave Ovens
We've seen this a million times.
This is usually caused by either a bad door switch, a loose door switch mount, or a misalignment of the door.
We have many Sharp service manuals, but would need your model number to see if we have that one on our site for you.
Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.
Switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.
If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk
You can probably find an exploded view by entering your FULL model number here: http://www.searspartsdirect.com
You can order needed Sharp parts from Tritronics at http://www.wehaveparts.com
We're happy to help and we appreciate your thoughtful rating of our answer.
Posted on Mar 07, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
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click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
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In this case as the display does not show a clock then it seems the program controller is not working correctly. So check power - step down supply, if the pads are responding- if not faulty pads. Also the door switches, if the switch contact are not good then it will not trigger the processor to switch on the waveguides. If the lights or fan work without any display or action of program being triggered to start then it can be a possible fault on the main board or the processor. Sometimes insect secretion can short the board and display panel and so the processor can work in such an erratic manner. If so clean,solder and reset the board.
Now identify the parts by clicking this link: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html
Now unless the display works and the processor starts to switch on the MAGNETRON , the table and light will also switch on as it must heat.
So it is necessary to check the main controller unit as it seems to be the suspect..
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