Garage door locked surprisingly your garage door just being locked can be causing your problem.
Manual garage door stuck closed.
The emergency cord will release a lever that connects the door itself to the garage door opener track.
However if you encounter resistance stop.
I managed to get a camera inside to look upward and can see that one of the cables that attaches to one of the spring latches has broken.
You can view this video on how to safely open your garage door with no power here.
Locate the emergency cord on the overhead track of your garage door opener.
Some garage doors have a full lock system which enables you or anybody to lock your garage door from the outside by only turning the handle.
Once the lever is disengaged you should be able to open.
A garage door stuck in the closed position may tempt you to crash on through but don t let frustration get the better of you.
Lawn building manual garage door stuck closed i have a manual garage door that has a center locking handle that decided to stop opening yesterday.
How to close your garage door by hand 1.