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Microwave Oven Sharp R820BK Convection Microwave oven. LCD has gone bananas....can't read numbers. What shall I do?

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We repair these on a regular basis for customers nationwide with our guaranteed $39.95 service.

We have full details, plus *critical* safety, disassembly, and troubleshooting info at our site. You'll find a link to our site in our listing here on FixYa:

Posted on Dec 01, 2007


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Posted on Jan 02, 2017


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When the unit is turned on it shoots flames from the roof of the unit WHY?

It sound like the antenna behind the plastic plate may be warped and touching the cavity. From my experience when they start shooting sparks it is time for a new microwave.

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The service manual is here:

You can get Sharp parts from Encompass here.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead several seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.
See this:

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Best way short of Sharp is Google the model number of the unit with "manual" to try to locate free one online.

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Display does not show information (words or numbers) when entered or while running. Cannot tell what it is doing, however light, turntable seems to function. Can it be fixed or can the display pad be...

Sharp uses a conductive strip between the display crystal and the circuit board. If you remove the board and pull out the conductive rubber strip, clean it with alcohol or an eraser then re assemble it. it might work Other wise, you have to replace the main circuit board as an assembly. Get your model number and call a parts house called encompass parts. For pricing and availability

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Light has burnt out

R-820BK/BW Microwave Operation Manual
Due to the risks of death or serious injury the above owners manual suggests that a burnt out light demands a service call by a qualified technician.
That said, if you have a basic level of competence and read the safety hazards involved with microwaves (see a good resource on microwave safety and repair at:
Often, the microwave is divided into two main compartments, the electronics compartment(usually immediately behind the front control panel), and the high voltage compartment(usually behind the electronics compartment). The light bulb is likely in one of these two primary compartments. If it is in the high voltage compartment with the HV Capacitor and magnetron, changing the bulb becomes much more dangerous.
Please be very careful if you do decide to do this on your own... unlike most electronics microwaves can remain lethal, even when unplugged. Hope this helps.

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Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

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