Frigidaire Genuine OEM 5304477390 Microwave Electronic Control Board. The electronic control board manages various microwave functions, such as heating, lighting and turntable operation.
This part works with the following brands: Frigidaire, White Westinghouse, Kelvinator, Gibson, Kenmore, Sears, Tappan, & Electrolux.
Possible Repair Solution For:

Will not start, timer will not advance, clock does not display.
Please Note: This is intended as a guideline only, as other items can cause the same symptoms.
This part is also known as a main control board.