Treadmill with a fault on control board (Sutton Coldfield B73)

NordicTrack C2000 folding treadmill.

Great Treadmill carefully looked after. Fault developed on the control board, it still goes but you can't change the speed or the incline.

 weight 135 Kg
Dismantled for transporting but it is still very heavy and needs 2 strong adults to move it.
the running area folds upwards to save space when not in use.
Running Area Inches: (L) 56 x (W) 20 Rollers: 2.5" diameter rollers Open Dimensions CM: (L) 185 x (W) 90 x (H) 140 Closed Dimensions CM: (L) 85 x (W) 90 x (H) 160