Question about Microwave Ovens

2 Answers

Cannot get display on oven. Checked fuse, ect., have power to board. Checked door switches.

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Microwave Ovens Master
  • 9,047 Answers

Can you post your brand and model?

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

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:

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

Posted on Feb 15, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 2,124 Answers

Does the oven still operate (keypad, cook, etc) even with the display not working?

If the oven does NOT work with keypad:
If you have confirmed that you have the proper DC voltages(s) to the microprocessor board, it sounds like there has been a failure on the microprocessor board.

If the oven DOES work with keypad:
It sounds like the display driver or display itself has failed.

In either case, you'll need to take it to be serviced.

Please let me know if I can be of any further assistance to you.

Good luck!

- Jim

Posted on Feb 14, 2008

1 Suggested Answer

  • 2 Answers

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

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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
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

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

No power to unit replaced thermostat , door switches, diode on capacitor but not the two fuses continuity goes to 0

There are 2 thermostats or "thermal fuses" in it that would cause no power. One is on the magnetron, the other is above the microwave cavity near the middle. Have you checked/replaced both? You should have 120 volts between the white wire on the main relay on the circuit board & the black wire in the smaller connector on the board. If you do, bad board, if not, something before the board (fuses, thermostats, noise filter board, etc). Door switches, diode, capacitor would not cause no power to unit.

Jun 03, 2015 | Samsung 2.0 cu ft Over-the-Range Microwave...

4 Answers

No Power


Did you try replacin the fuse.It might have blown.

Jul 03, 2008 | Sharp R-930AK Convection/Microwave Oven

2 Answers

Why my Daewoo microwave oven blows the fuse only when the door gets closed while when it startre with the door opened the bulb is lit and so is the control board until the door is closed then it blows

Hi. The fact that the fuse blows when the door is closed is quite logical. There are safetyswitches preventing the oven to start with an open door. As to the fuse blowing, There are 3 possibilities: the High voltage trafo is defective, the voltage doubler diode or the capacitor are defective. You must be VERY CAREFULL when working on these parts: the voltages are LETHAL.

Aug 25, 2014 | Daewoo Microwave Ovens

1 Answer

The black dispay,

It sounds like you checked everything affordable. Going much deeper than that will be cheaper to just replace it. Microwaves are short life appliances, but they are also very affordable to replace. Make sure you checked all the micro switches- there should be I think 4 switches in the door. There is also a fuse on the circuit board. Good luck!

Mar 06, 2014 | GE SpaceMaker Microwave Ovens

1 Answer

I lost power due to the storm, when power was restored the microve didnt come back on, i checked brekers, and the 20amp fuse inside the unit, everything was good

Make sure that the program controller is working if not check power - step down supply, 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 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:

If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron. Check this link to know how a microwave works:

Nov 06, 2011 | Maytag Appliances Over-the-Range Microwave...

1 Answer

Kenmore hood microwave door was slammed shut, now it won't power on. Fuse is good, door switches don't look damaged or dislodged. I haven't ohm'd the switches. They should not be the problem as the...

While the door was slammed it is possible that the connection to the main board was disconnected. so since there is no display I recommend that you check the power to the processor board, check if the LT circuit is working , if the board fuse has failed or if the power supply here is faulty.
Only if the display comes back will it confirm the working o the processor.

Apr 01, 2011 | Kenmore Microwave Ovens

1 Answer

The oven will not work. I checked the fuses and they are good.

Is this a dead mirowave or semi dead. the display works, light works in the oven when door opens.
If this is the case... you may have a power supply board failure or the magnatron is defective
Check the power supply first, because it would be cheaper to repair then the magnatron

Aug 05, 2010 | Kenmore Microwave Ovens

1 Answer

Microwave has no power


If your microwave oven doesn't seem to work at all, check these:
Fuses Usually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven. When it blows, you need to have a qualified appliance repair technician replace it.
Door switch If the fuse isn't the problem, check the door hooks and the door-release button. When these are broken, the door switch doesn't activate, so the oven can't work.


Jan 15, 2009 | Whirlpool MH7135XE Microwave Oven

1 Answer

H5470 built in microwave

sound like the door monitor switched has blown or shifted out of position if the switches dont operate in tandem when door is opened or closed it will blow the 10 amp fuse and kill the display they will need to be checked by engineer if it is monitor switch they are not expensive to replace.

Apr 01, 2008 | Neff H5470 Microwave Oven

Not finding what you are looking for?
Microwave Ovens Logo

Related Topics:

63 people viewed this question

Ask a Question

Usually answered in minutes!

Top Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

9047 Answers

Gerry Harvey
Gerry Harvey

Level 3 Expert

1456 Answers


Level 3 Expert

71162 Answers

Are you a Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides