Display Panel Dims and Goes Blank

The electronic display panel becomes dim and completely disappears intermittently. It has been blank for two weeks until we tryed the self cleaning mode today and it came back very bright. What is going on? Any suggestions?

libertyappl said:
Check the connections going to the control board. Sounds like one maybe loose.
Nat
Thanks Nat. When the oven cooled after the cleaning the panel went blank again. I checked all the pluges in the back of the control panel and they appear to be tight. I wiggled each of them and the display didn’t come back.