So a few months back my pitt boss had no display. Pulled the controller out, which is where you set your cooking Temps. I found a poor soilder connection on the black wire to the board. Fixed it and back in business. Then yesterday I went to cook a ham a once again no digits on board. Figured same problem, not the case. Found after taking connections apart to be a bad cord end. Cut plug off and replaced. Back in business again.