GE Microwave Model JTP90SP3SS over range heats by itself after door closed

Microwave Repair
1

Brand: GE
Model Number: JTP90SP3SS
Main Symptom: Our microwave oven over range got problem: it starts heating by itself after door is closed, heating fast! Meaning I can’t let it sit there with door closed. I have replaced 3 door switches (2 FD-63 and 1 FD-62) and the problem remains. Possibly the relay or some parts on keypad/control board got bad? For now I have to leave door open (and light on) whole day as shown in the photo attached.
What happens & when:

Error Code (if any):
Parts or tests already tried: Replaced 3 door switches (2 FD-63 and 1 FD-62)
Photos / video link:

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image01134×2016 453 KB

2

The control board more than likely has a bad relay on it and would need to replace the board.

3

Thanks, Ed!

https://www.appliancepartspros.com/ge-control-panel-asm-wb27t11346-ap5669701.html

Do you think the part (see the link on appliancepartspros.com) is the right board as the replacement? The GE Microwave Oven Model # is JTP90SP3SS.

https://www.appliancepartspros.com/ge-control-panel-asm-wb27t11346-ap5669701.html

Eric