how to fix a garage door that won't open?
['Make sure the opener is plugged in.', 'Check the circuit breaker that powers the opener.', 'Did someone lock the door?', 'Check to see if the trolley has been disconnected.', 'If you suspect the problem is in the remote, try resetting it.', 'Clean the photo eye.', "Adjust the opener's pulling force.", 'The door might be off the track.']