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

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How difficult is it to replace the logic gard in a chamberlain 2.5 garage door opener

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Posted on Jan 02, 2017

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SOURCE: Chamberlain Liftmaster Professional 1/2 HP

Okay...upon further inspection, my left spring has broken in two. Going to call around for some quotes to replace the spring. Thanks for the suggestions.

Posted on Jul 25, 2008

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SOURCE: Garage door opens but does not close

check that lenses on safety beams are clean and that they are aimed at each other so that both have led light on.

Posted on Jan 15, 2009

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SOURCE: Replacement for Garage Door Remote

The red button is the "learn" button. No resets.

Posted on Mar 25, 2009

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SOURCE: Garage door does not function makes couple of buzzing sounds only

Remove the cover and check out the drive gear. It is white nylon and is probably stripped.

Posted on Jun 01, 2009

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SOURCE: Code reset button for garage door opener

The button is just to the left of where all those white wires go. You may have to remove a light lens to get to it.

Posted on Jun 08, 2009

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1 Answer

How can I test the Receiver Logic Board for Craftsman 1/2 HP Garage Door Opener Mod.139.53962SRT1


The only way a homeowner can test a logic board is with a good remote that is programmed to that logic board.

Jun 20, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

We just installed a CG40Chamberlain 1/2 hp garage


Your logic board is bad. If this is a used opener I would pull the logic board and look for loose or missing traces on the printed circuit board.

Apr 19, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Unabler to program a chamberlain garage door opener


If you are absolutely sure you got the correct remotes for your opener then you have a bad logic board.

Dec 31, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

How do we reset our Craftsman 1/2 HP Part# 41A4315 - 7A garage door opener? When you press the button is goes down a little ways and then back up. The little green sensor lights will not come on either,...


If the lights in the door sensors do not light you have either a bad logic board or bad wiring to the sensors. Replacing the logic board is usually the cure.

Jun 05, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Chamberlain Liftmaster Sensor Problem


I think it time to replace the logic board
http://www.chamberlain-garage-door-openers.com/circuitboardcompatibilitychart.htm

Jan 10, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage Door Opener Intermittingly Reversing


try adjusted the sensor controls on the sode of the unit other wise replace the logic board
http://www.chamberlain-garage-door-openers.com/circuitboardcompatibilitychart.htm

Dec 24, 2007 | Sears Craftsman LiftMaster Chamberlain...

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