Hey Max, I have having a similar situation as well. Only thing is even with the key on it, the console stays "replace safety key". So I replace the senor with a new sensor and am having the same problem. It has a MC2100 board as well and is a Nordictrack Commercial 2150. Any help would be much appreciated. Thank you.Your Welcome!
Max.
Moderator edit: New thread sprung off from this.