Display Lights Up, Treadmill Moves, Speed Will Not Increase - Landice 8700 Series Service Manual

Display lights up, treadmill moves; speed will not increase; "L5" error.
6.1
Press START button.
6.2
Is yellow SPD lamp on the motor control
board lit?
6.3
Is speed sensor aligned squarely and
within a credit card's thickness from the
flywheel?
6.4
1. Check speed sensor wires.
2. Replace speed sensor. Part # 71007
NO
Replace motor control board.
Part # 70080 (110V), 70081 (220V)
YES
1. Disconnect the speed sensor
from the motor control board.
YES
2. Is the yellow SPD lamp on the
motor control board still lit?
NO
Realign sensor.
NO
YES
Replace speed sensor.
Part # 71007
56