Weather damage and harsh impacts can also distort your garage door track.
My garage door trolley is stuck.
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.
Surprisingly your garage door just being locked can be causing your problem.
The garage door opener motor will hum when attempting to open or close the door but is unable to travel due to being lodged against the bolt tab.
If you detect a small bend you may be able to straighten it out yourself but anything more extensive will require professional intervention.
Even with regular maintenance garage doors can sometimes stick refusing to open or close.
Typically this is caused by a mis adjustment.