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No crystal display on sharp microwave everything else is fine

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We regularly repair these control units forcustomers nationwide by mail for $39.95 postpaid in about a week.

Atour site, we now have a video available showing how to remove a typicalover the range control panel assembly in under 5 minutes.

Feel free to contact me directly 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

Posted on Oct 20, 2008


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017


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Panel light on Bosch microwave out but works fine. I'm just flying blind

I have had sometmes where bad solder connections on the display crystal stopped the display from working. May be worth a look at the connection on the main board where the display crystal is soldered to the board. If not, new main circuit board $$$$. Sharp uses a conductive rubber pad below the crystal to conduct power to the display. It is possible Bosch did something like that too. If so remove the main board, see how the crystal is connected to the board. Clean the rubber conductive pad or look for bad solder connections.

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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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Remvoe the panel and see if there is any infestataion of cockroaches or insects into the display panel. if so remove and clean the bord properly using some petrol and a brush. make sure you do not damage the display or the board. Now check for any dry solder on the printed board , if bad do a touch up solder on the suspected dry points. check for the filter capacitors of the power supply and the regulators.
Check votage to the mP , solder the crystal and check.

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Sharp microwave 1200 watts keypad showing

Not a complete answer, but may help describe problem: Our R-510B should be the same except for color, and for several years it has intermittently messed up its display. The left side two segments on the units digit won't light up. So a digit 8, without the two vertical bars on the left, comes out as a letter E reversed left to right. Any digit that uses the two left segments (traditionally labelled segments E and F when talking about 7-segment displays) comes out wrong. Every thing else works fine. I can't tell if this is your problem.
This is almost surely a bad contact at the interface between the LCD display panel and the PC board: Typically there is a "squishy" conductive strip that connects them, and I expect grease has gotten in there. If so careful disassembly and cleaning with a mild solvent should fix it. Since we can live with it, and it usually fixes itself in a few weeks, I have not got around to taking it apart.
Bob Wilson

Oct 24, 2009 | Sharp R-510HW Microwave Oven

1 Answer

The display no longer works on my Model R303CW Sharp Microwave. Is there a part that will fix the display?? Everything else works fine.

Nope , could be dry joints or corroded pcb or defective display driver or supply ? Only can be told once opened and inspected.

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Hi our Sahrp Carousel microwave LCD panle display is not working

You have to replace the control board. Sharp has had problems with the display boards for awhile. There is no bulb or fuse you can change.

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My Sharp R-340D microwave works perfectly but Does NOT HEAT FOOD

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

Microwave Oven Basic Troubleshooting Tips



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1 Answer

Sharp 1100 w Microwave Model R-420BK - Clock display not working correctly

This is a problem with the control panel assembly, and we repair these for customers nationwide with our guaranteed $39.95 service.

Feel free to contact me directly.

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

William E. Miller

Aug 13, 2008 | Sharp R-420DK Microwave Oven

2 Answers


easy to fix you need to cut the tracks to the led lights then solder 2 wires to the leds next use a 1k resistor on one of the wires then conect it straight to the power surply just after the bridge rectifier noteing+ and -

Mar 06, 2008 | Sharp R-202EW Microwave Oven

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