When the automatic garage door opener is turned on, the cables physically move the door while the strings control its speed.The metal rails keep the garage door in position and assist with the mechanism’s operation. The tracks on the garage door must be straight and even at all times to open and close. A crooked door may jerk around or make grinding noises that could have become loose from its track. As the misalignment increases, the garage door may eventually stop operating. It will need a fix and professional garage door repair in Great Falls, VA  https://www.thelifestyle-blog.com/most-typical-reasons-why-your-garage-door-wont-open/