Weird Disco fridge

I have never seen this one before and i have checked the site and the book. nothing like this in the book. Have a Dometic Rm 2611. Not sure how old it is. Rv is a 94 so it could be original. We replaced the brain box two years ago. Fridge has worked fine since. Today came out and the temp lights have gone disco on me. Sometimes it is slow and sometimes it can go pretty fast. Doesn't jump around stays in order from highest to lowest and repeats. Fridge is working and no check light. I cleaned the unit last fall and today i went out and checked and cleaned all the grounds just to see if that made any difference. Still doing it. I am wondering if the brain box went bad again or ? Weird for sure.... Any ideas??