Replace the control board
after sales service guide
Before replacing the motor control board *** UNPLUG TREADMILL ***
Remove the screws from the motor cover
You can use some ethyl alcohol on the white connectors connected to the board to make them easier to remove.
Use needle nose plier to remove the motor wire connector from the control board, don't use your hand
Remove the 4 screws securing the control board to the belly pan.