All led lit control buttons quit working only the interior freezer and refridgerator compartments lights would still work normally William P. • Ellensburg, WA • March 10, 2015 Appliance: Model GE PSC23SGRBSS My Repair & Advice Replaced the main control board.. In order to be sure of the wire bundle locations, I took pictures and tagged each location with a brief location direction. There was one location on the new board for which I did not have a wire bundle. It was labeled a "P4" . On the defective board there was also a P4 but it did not have a four prong connector. I suspect that the newer version had a feature that was not available on my model. After installing and testing all components worked normally. Was this review helpful to you?