Question about Microwave Ovens
Can you post your brand and model?
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Posted on Feb 15, 2008
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.
Posted on Feb 14, 2008
Tips for a great answer:
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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:
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