Treadmills problem ER7 - Exercise & Fitness

This error has 2 alternatives: proceed according God bless you
E7- 1) Alternative Elevation Motor
1)Cause: Elevation Motor not moving Solution:Check Elevation Motor connection
2)Cause: Elevation Elevation Motor screw binding Solution: Clean screw and lubricate
3)Cause: Elevation Motor Motor out of Range Solution: Check motor out of elevation
4)Cause: E-Motor Potentiometer: Solution: Replace Elevation Motor
2)Alternative:
Display Doesn't Light Up: a)Cause: On/Off switch Solution: Test unit is turned on b)Cause: Insufficient Power Source Solution: Plug dedicated120V, 20Amp Outlet
c) Cause: Line Cord Damaged Solution: Replace Line Cord
d)Cause: Fuse Solution: Check Fuse on MCB