Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Have a Craftsman Garage door opener - doesn't activate, only the light blinks. Neither sensor has any lights lit. Any suggestions?

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If you mean the main light blinks when you try to close the door then you have bad door sensors or the wiring going to them. Make sure the connections are tight and the wire is not broken somewhere.

Posted on Nov 13, 2009

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Most likely your sensors are out of alignment. Check to make sure the small light on each sensor is lit and not flashing.

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Yeh, read manual. Do both sensors have led lit. try aligning. you have safety beam problem,

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