tredmill skips when on it?

I lost the key to my prform 770 ekg treadmill,where can I buy this key?

e1?

Aligning belt?

How do i determine the value of a burnt resistor?

my treadmill stopped?

Incline stuck up?

Incline on my treadmill works, but nothing else?

when walking the belt will stick?

My treadmill inclines but the belt will not run. I checked everthing!?

380 proform razor?

how do i remove the motor cover without breaking the plastic?

Treadmill Warranty?