Brand: GE Profile Model Number: SCB1001KSS01 Main Symptom: LED display dark, but Microwave still works What happens & when: After thunderstorms, the display was erratic and since an in-wall unit, just reset the breaker and reset clock. Over time, the display has gone dead and my mother desires repair since it matches the GE Profile Oven below
Error Code (if any): None
Parts or tests already tried: Replaced microwave display board, WB27X10858 (AP3883432)
Photos / video link:
The microwave was previously working. Removed the back cover and 4 screws on the controller assembly, then replaced the display board. This did not revolve the problem. When I plug in the microwave, the display does not illuminate and I hear a faint clicking noise that I am unable to pinpoint. I evaluated the old display board and did not find any scorch marks or any obvious damage.
I am aware there are 6 boards total and that there is a 120 volt transformer (6170W2G008F). Also, aware that GE discontinued the transformer. I have located a LG transformer matching the same part # and indications are this is comparable.
I need assistance on diagnostics and would like to know how to evaluate the remaining boards. I see a GE fuse OEM part, but not aware if this model has one.
It sounds like the main control is the likely cause of failure. There are voltage tests that can be done to verify if this is what is causing the display to not operate. The power board would need to be tested at the connection CN7 for voltage from the transformer. With a multimeter set to Volts DC, test from the yellow wire at pin 1 to the black wire at pin 2, there should be 12VDC. From the white wire at pin 3 to the black wire at pin 2, there should be 19VDC. Finally, there should be 7 VDC from the red wire at pin 4 to the brown wire at pin 5. If those voltages check good, the next step would be testing the connection CN4. With the black meter probe placed at the wire on pin 15 (the manufacturer does not label the wires on this connector to identify wire colors, there should be a stamp on the control at the end of the connector to identify wire position), the red probe can be placed at the wire on pin 1. There should be 5 VDC. The red probe would then be moved to the wire at pin 2 for 14 VDC, pin 3 for 7.5 VDC, pin 4 for 12 VDC, pin 5 for 0-5 VDC, pin 6 for 5 VDC, pin 7 for 0-5 VDC, pin 8 for 14.5 VDC, pin 9 for 4 VDC, pin 10 for 5 VDC, pin 11 for 4.7 VDC, and pin 12 for 5 VDC. Are any of these voltage readings missing? WB27X10858 Microwave Display Control Board | Genuine Ge OEM In Stock