whats wrong with my pro-form 545s?

My pro-form 545s console will light up but would not start.. at first ..when left unplugged for a while it started. but will only go on level speeds 1..2..3..4 etc no 3.5 the incline buttons does not work the fan doesn't work when you are walking the speed does show ...so does the calories burned and the distance..after each use i have to unplug it so it will start again in the am