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

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In trying to lift the metal tab in the light socket it sparked and now the garage door opener doesn't work.

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  • carlos_ro587 Feb 01, 2010

    I tried that and nothing.

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1 Answer

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  • Master
  • 3,197 Answers

You should have unplugged the unit first. Check your house circuit breakers.

Posted on Feb 01, 2010

  • Don Maggard Feb 01, 2010

    Unplug the unit and remove the logic board. Check for burnt or missing traces on the printed circuit especially around the small transformer.

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I have a liftmaster fromula 1 GDO. The lights do not come on when the dorr opens. The lightbulbs are good. Any help?


There may be a switch up by the lights, it may just not be set to turn on when the door opens. Also I found on mine, the opener attached to the wall in the garage has a button that turns the lights on and off.

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if you are using the new florescent bulbs they don't always seat deep enough. Unplug the opener remove the bulb in the bottom of the socket there's a metal tab use your finger or a small screwdriver and bend/lift the tab up a little bit. this should fix your problem

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The lights on my liftmaster garage door opener suddenly stopped working I have already replaced the old light bulbs with ones I know work but the lights are still not working.


Unplug the opener and remove the light bulb. Using a small screwdriver lift up on the center contact of the socket. Replace the bulb and plug the opener in.

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I'm sure you know this now but it sure would have been safer had you unplugged the unit first.

Jul 29, 2009 | Sears Craftsman LiftMaster Chamberlain...

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