Craftsman garage door opener 1/2 HP
My garage door opener quit working.
(1) Both lights on the sensors are not lit.
(2) When the wall mounted door opener is pressed, the door goes down a few feet and the light blinks several times.
(3) Is there a significance to the number of blinks when the unit is malfunctioning.
(4) Does anyone have a PDF version of the owners manual for a standard 1/2 HP Craftsman Garage Door opener (Square looking model)
Any help would be greatly appreciated.