Question about Sharp R-402J Microwave Oven

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Sharp R-402JKF microwave

I came home and noticed the display on the microwave said 'ERROR'. The keypad doesn't work. I unplugged it for a minute and plugged it back in. Now the display flashes 00:00. The only button that works (and makes a noise) is the night light. Any suggestions before I take it in for repair?

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Re: sharp R-402JKF microwave

Well guess what! MINE JUST STARTED ON FIRE! Unbelievable, I'm awaiting a reply from Sharp. A fire ball came out the right side, inside and now rests a hole.

Posted on Mar 17, 2008

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Re: sharp R-402JKF microwave

It sounds like your electronic board has malfunctioned. It may have to be replaced, sometime it is cheaper to buy a new oven. Technician's fees and parts may be more than it it worth.

Posted on Dec 26, 2007

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SE is an error code for a shorted keypad, although the keypad might not really be shorted.

Unplug the oven for a few minutes to see if it clears the error code. If not, then leave it unplugged over night. If the problem persists, then you probably do have a shorted membrane switch on the keypad.

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I have a Maytag Microwave/Hood MMV4203DS00. Twenty minutes after its last use as a microwave oven, the Vent Fan spontaneously went on and the Display Shows: VENT...FAN..--5E-- (or SE?). The microwave...

"SE" error means you have a shorted membrane keypad.
On this model, the membrane keypad is not available as a separate part, so the control panel frame assembly (which comes with a new keypad) would have to be ordered and replaced.

It's actually a pretty simple DIY repair.

The frame assembly is part number W10258190 and you can get it for $67.98 (subject to change) from the Pros here. You can also order the thermostat (part number WB27X10567 ) from them.

Their is a video here showing how to remove a typical over the range control panel assembly in under 5 minutes.

Then you unplug the keypad as per the photo below.


Some connectors on the relays have a lock:

positivelock.jpg Then move your circuit board into the new frame. Be careful, the display is made of glass.

Sep 01, 2013 | Microwave Ovens

1 Answer

Se display

Hello Arold - Typically, error code SE indicates a shorted keypad. Try resetting the microwave by unplugging it or flipping the household circuit breaker off. This usually clears most false error codes. Wait approximately ten minutes and if the error code does not clear, I would recommend contacting a professional to proceed further. Most likely the touch keypad on the unit will need replacing.

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Display on my Sharp Carousel R-425EW stopped working, is there and easy part to replace?

see the next steps: use the common sense .God bless you
If you have a stuck key or non-responsive key, most of the time you will have to replace the keypad for this microwave oven repair. If your keypad is connected to your control board by a flat ribbon wire, try disconnecting it and clean the silver contacts with an ordinary pencil eraser. After cleaning, plug it back in and try it. If it doesn't fix it, replace the keypad unit. Some units actually have keypad tests to confirm your diagnosis of a bad key.
If your keypad and control is the same unit, replace that unit. Another note, unlike stove/oven keypads and controls, most microwaves do not have error codes or tests to distinguish whether it is truely the keypad or control. Most of the time, it is the keypad that needs replacing, but a small percentage of the time it can be the control. Check the tech sheet if they can point you to the right part.


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1 Answer

Sharp Carousel Model R-209KK-W is flashing all 8's and keypad not working

The first thing to try is to do a hard reset.

Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

If that doesn't work, leave it unplugged for about 5 minutes.

If it still doesn't work, it may need repair, which can be done for $39.95 in most cases.

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No! I'am afraid not, the problem is in the keypad control board, the whole assembly must be replaced, the part alone will cost around $100.00 or more depending on make and model.

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I have sharp microwave oven model R-231F. On digital display (which is suppose to show time) only 88888 is displayed. suspect fault with the PCB behind display or keypad. Please advise how I can obtain...

First I would suggest a "hard reset". Simply unplug the oven for a minute or two, then try again.

If it still fails, it may be that the keypad has failed, or there is a bad connection due to moisture, grease, etc.

This is an Australian model, so it's hard for me to give more specific information.

But one some US models the LCD and keypad connect to the circuit board via a rubber "zebra strip" and losing that connection can result in a loss of display segments and / or key response.

I've attached a diagram showing where one can clean to restore operation in this case.


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

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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

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I've attached the portion of the manual which shows how to lock & unlock this model.

If that doesn't work, unplug the oven for one minute, plug it back in aga9in, then try again.

If it still doesn;t work, then your keypad has failed, and they are no longer available for these model, so the oven would have to be retired.

Good luck.

We're happy to help and we appreciate your thoughtful rating of our answer.


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check blower fan, and maintained gap between oven and wall at last 2 feets. some heat comes to pad very heat may be some prolem. check every thing and reply me.

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