A humming opener does not always mean the motor is the only problem
The opener may be trying to move a door that is jammed, too heavy because of a spring failure, disconnected at the trolley, or affected by a drive-system problem.
Look before testing again
If the door is crooked, off track, or you suspect a broken spring, stop using the opener. Repeated attempts can add damage.
If the door itself appears normal but the opener only hums or clicks, see garage door opener repair.