Start with power, the lock button and the sensors. If the door itself moves freely by hand and the opener still won't run it, the opener is the problem.
Opener repairOpener humming, clicking, reversing or dead? Safe checks to try first, which problems are worth repairing and when an old opener should be replaced.New openerChoosing a new garage door opener: chain or belt drive, battery backup for hurricane outages, phone alerts and what a proper installation includes.Keypad and remoteWall button works but the remote or keypad doesn't? Batteries, the lock button, reprogramming and the LED bulb problem, in plain steps you can try.