BROKEN OR WORN OUT HINGES
Most modern garage doors consist of four or five sections that extend across the entire width of the opening, and are connected with hinges. Garage door hinges attach to back of door in between door panels that tie panels together so the door can bend when opening and closing. Hinges on each end sides of the door panels has a mount for a roller that rides in a guide track, which combine to raise and lower the door along the guide tracks. They are small in size but hinges are essential to the proper functioning of your garage door. Should they break or wear out, opening the garage will be difficult, if not impossible. Even worse, broken hinges can cause serious damage to the door itself. Look for signs of deterioration and get them fixed before it may cause you to be faced with a lot bigger issue.
Hinges tend to deteriorate over time and when they break cause the door to open and close incorrectly. The door hinges are subjected to a great deal of stress every time you open or close the garage. Other trouble sources are bent or cracked door hinges, or damage as the result of impact, such as someone backing their car into the door. If the hinges have not been properly maintained, they may become rusted or corroded, especially if they are exposed to unusually damp or salty air. Sometimes the screws that hold them on door panels will come loose and fall out causing same problem as a broken hinge.