Question about Sharp R-1874 Convection/Microwave Oven

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All 88888's on display after power outage can't program anything,

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I bet you did not have a surge suppressor on it. Just checking.
Your PC board is damaged.

Next time you need a surge suppression.

I have one for $39.00 for this unit.

www.storminprotection.com

Posted on Sep 11, 2009

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GE jvm1750DMIBB microwave, I had a power outage and my microwave does not work at all. What do I need to do??


If the fault occured only after the power issue then make sure that the program controller is working if not check power - step down supply, fuse . Also if the pads are responding- if not faulty pads- or the door switches, if the switch contact are not good then it will not trigger the processor to switch on the waveguides. If there is no 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, but first take a power supply test, then the internal LT supply before confirming the main board.

Oct 04, 2011 | GE Microwave Ovens

1 Answer

We had a power outage and the display is blinking and there is no response to pressing any button


First, try unplugging the microwave for 2 to 5 minutes and then plugging it back in. Sometimes, a very brief power outage will be sensed by the control as an internal error and the control will lock itself out.

If it continues to blink and does not respond to key presses after this "hard reset", it is likely a portion of the control board could have been damaged from the power outage.

FYI ... the touch panel for this model is no longer available. I mention that because no response from any key press can also denote a shorted key pad.

Apr 15, 2011 | Frigidaire FMT116E1W Microwave Oven

1 Answer

Our 2006 Samsung Microwave has suddenly ceased to heat anything. The clock works and the turn table goes around, but that's it. We had a couple of power outages just before this happened. Could it be...


Hi,

Press the "Off/Clear' button to cancel anything on the display, and reset the microwave. This is a soft reset and will simply get you out of any program you have started. Press it when the cooking complete reminder appears on the display.
Perform a hard reset. Pull the plug out of the wall power supply, and wait a moment. Plug the GE microwave back into the wall power supply to reset any anomalies with the microwave's memory. You will need to reset the time of day if you perform a hard reset.
Reset the time of day. Press the "Clock" button, and turn the dial to set the hours. Press the dial to enter. Follow the same procedure for the minutes and a.m. or p.m. Press the "Start" button to start the clock.

Nov 29, 2010 | Samsung Microwave Ovens

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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.

a98b491.jpg

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

Oct 01, 2010 | Sharp R-1480 Microwave Oven

1 Answer

After lightning strike & power outage digital display & oven not working. is there a fuse or reset button? or is the circuit board fried?


Start by investigating, open at the point where power cord goes in there is a fuse if it is o.k there is another smaller trans former powering the display board that normally uses thermo fuse, find out whether the thermo fuse is blown i hope this solves your problem

Aug 02, 2010 | Microwave Ovens

1 Answer

Can not reset after power outage


If display is on and you cant reset, the board has been damaged during the power outage. The current shoots up over the safe limit and does the damage. need to replace board and put a surge plug on line

Sep 15, 2009 | Kenmore Microwave Ovens

1 Answer

Microwave Key Pad stopped working


buy a new one they are not expensive wal-mart has 1000w for about 80 bucks

Jan 25, 2009 | Sharp R-1874 Convection/Microwave Oven

1 Answer

Microwave has no power


Is the outlet ok? Can you plug somethng else into the outlet to see if the fuse or breaker controlling the outlet is ok? If there is power at the outlet, unplug the unit and remove the outside cover.
Look for a blown fuse on the motherboard. Replace it with the EXACT value of the original fuse. You can purchase a new fuse at Radio Shack or hardware store or auto parts store. Try powering up the unit again and see if it works now or whether the fuse blows again. If it blows again, the power supply may have been damaged. Was this a power outage or surge? Was anything else in your home affected?

- Jim

Jan 29, 2008 | Goldstar MV-1526 Microwave Oven

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