Why is my MCO165UB display not illuminated? - Magic Chef Over the Range Microwave. 1.6 cu. ft. in Black MCO165UB

Try unplugging the unit for a few minutes. The microprocessor on the control panel may have locked up. Leave it unplugged for at least 15 minutes to see if it will reset.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

dont know but if it wre me i would drill the other hole out then put screew

250v 20a fuse

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Noise Filter Fuse

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: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html

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:

http://www.espares.co.uk/advice/microwave/a/5/1443/how-a-microwave-oven-works.html

So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off. Check the wave guide covers, if food had deposited
then it must be checked or replaced. See link: http://www.espares.co.uk/advice/microwave/a/5/1146/how-to-replace-a-microwave-guide-cover.html

Now keeping clear of the microwave, switch on; use a cup of water inside to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.
If there is heating without any issues, you can use the microwave safely

Sometimes that is a fan switch to turn on the blower if it gets too hot when cooking on the stove top. But you say the schematic shows it should be closed. So jump it and try the unit. if it works OK then replace it.

I would have your house hold supply checked on the socket that it is plugged into. One appliance fail but not two.
I hope you find your fault.

It will be the display driver or illumination that has packed up. A replacement display panel is required.
Consult an authorised Microwave dealer for price and advice.

try removing the touch pad/switch membrane and cleaning connections on ribbon cables. if problem still exists replace switch membrane.
Phil

Try pressing "Clock" and then "Start"

This is a problem with the control panel assembly, which we repair nationwide for $39.95. You can find full details on our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk