For the refrigerator over-cooling issue, I replaced the control circuit board, no luck (by the way, AppliancePartsPros parts forums did not suggest this part, this was my own $500 idea that didn't work). Next, I replaced the refrigerator thermistor per the AppliancePartsPros forum, no luck. Finally, I replaced the damper control, also per the AppliancePartsPros forum and that fixed it! If you have this issue, I'd suggest looking at the damper control first. It's easy, just pull the little slotted cover off the center back of the refrigerator (where the cold air comes out of) and look at the damper control door. Mine was stuck open even with the refrigerator at 29 degrees. I reached in and pushed on it and it closed. If I would have replaced the damper control first, I would have saved $600.
For the controls not working issue, a new keyboard control part fixed that. Super easy fix as well.
Thank you AppliancePartsPros! Part ordering was simple, shipping was fast and the tutorial videos were great making my repairs super easy and effective! I'll be telling anyone with an appliance issue to go to you first!