Sometimes Display Turns Off When Door is Opened & Keypad Intermittent
My GE JVM1752SP1SS microwave has a few different symptoms, and they are intermittent, making diagnosing difficult.
"Main Control Board
To determine if the control and display board is defective, try pressing each of the buttons on the control panel. If none of the buttons are responding correctly, it is possible that the main control is defective.
Here the part:
Before buying a new one, you can test the cap[aitors with your multimeter. Look for ones that may have leakage or expanded ends.
Here’s a video on replacing it: