This is an electronic control board that is located inside the control panel of many GE dishwashers. This part is tasked with managing all the functions of the appliance such as washing, draining, and drying dishes. The electronic control board can become physically damaged or experience issues...
Here's the video that show you how to remove the cover to access the machine control board, and STATUS LED on it: Machine control board access video
Don't remove the control board from its metal casing.
Make sure you leave all the connections connected to the control board when viewing the STATUS LED.