Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
If the main light is blinking 10 times it is a door sensor problem. Make sure the door sensors are pointed at one another and the small light on each one is lit and not flickering. Tweak them a bit. If you cannot get both lights to come on you have bad sensors.
Posted on Dec 29, 2010
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Posted on Jan 02, 2017
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