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

1 Answer

I can't successfully install my new logic board. I'm replacing board 41a5021-3c with 41a5021-2g. I was told i need to do this so I can operate 2 vs 1 remotes. I'm hooking up wiring the same way the older board was wired, with the possible exception of the YELLOW wire (what terminal does that go on?). In short, the unit does not power on. suggestions?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 3,197 Answers

Something is strange here. With the original logic board you should not have a yellow wire and there is no reason why you couldn't use 2 remotes. It would help if you would post the model number of your opener plus the model numbers of the remotes you want to use. It is very important that the remotes are the correct models for your opener. You seem to be getting false information but there may be something I don't know yet.

Posted on May 17, 2011

  • 1 more comment 
  • rhinkley46 May 17, 2011

    The info you asked for is Craftsman door opener # is 139.53674SRT2, and the remote # is 139.53681B.

  • Don Maggard May 17, 2011

    Your opener will easily work with 5 remotes so adding a 2nd should be no problem at all. Just make sure the remote you are adding is the same model as the original. To program it to your opener just follow this procedure.

    Locate the smart/learn button on the rear of your opener near where all those white wires go. Hold down the button on your remote and then press and immediately release the smart/learn button.

    Post back if you have any problems.

  • Don Maggard May 17, 2011

    One thing I forgot to mention. Reinstall the original logic board first. That second board you have may have a problem because it should work with your opener.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer


Did you activate the new phone? Airtime won't add until you follow activation procedure. Also check signal strength signal and it will not update. If all else fails contact tracfone either via phone or chat.

Jul 19, 2016 | Alcatel Cell Phones

1 Answer

I replaced logic board unlocked but their is can disable .

So you bought a logic board and when you installed it, it already had a password set on it? That means the logic board was not new. Take it back to the Apple iStore.

You can clear it by connecting it to iTunes on a computer and do a factory reset.

Dec 26, 2015 | Apple iPhone 4S

1 Answer

After replacing a logic board on tallygenicom,it desplays the error "sucurity violation" how do i resolve that problem

Security lock was installed in the previous logic board remove the security lock and install it in the new logic board.

Feb 28, 2013 | TallyGenicom Office Equipment & Supplies

1 Answer

Error code 5100

There is no error 5100 in the manual so look at the following:

(1) Operator call errors (by LED blinking in orange)

LED blinking in orange. Error Solution Remarks

2 times No paper. Set paper, and press the Resume/Cancel button.

3 times Paper jam. Remove the jammed paper, and pressthe Resume/Cancel button.

4 times No ink. Replace the empty ink tank(s). (Pressing the Resume/Cancel button will exit the error without ink tank replacement.)

5 times The print head is not installed properly. - Install the print head, and close the

front cover.- With the print head installed, turn theprinter off and on.

- Re-install the print head.

8 times Warning: The waste ink absorber is almost full (approx. 95% of the

maximum capacity). Pressing the Resume/Cancel buttonwill exit the error, and enable printing.

In repair servicing, replace the bottom case unit (QM2-0647), or 5-item set of

the ink absorbers


The service call error, indicating the waste ink absorber is full, is likely to occur soon.

9 times The connected digital camera or digital video camera does not support

Camera Direct Printing.

After removing the cable between the camera and the printer, press the Resume/Cancel button, and re-connect the cable.

(2) Service call errors (by LED blinking alternately in orange and green, or lit in

orangeLED alternate blinking in orange and green

Error Solution

(Replacement of listed parts, which are likely to be faulty)

2 times Carriage error - Carriage unit (QM2-0655 / QM2-0831)

- Timing **** strip film (QA4-1053)

- Logic board ***'y (QM2-0750 / QM2-0751)

- Carriage motor (QK1-0175)

3 times Paper feed error - Timing sensor unit (QG4-0277)

- Timing **** disk film (QC1-2781)

- Feed roller ***'y (QF4-0155)

- Platen unit (QM2-0650 / QM2-0828)

- Logic board ***'y (QM2-0750 / QM2-0751)

- Paper feed motor (QK1-0224)

4 times Purging error - Purge unit (QM2-0825)

- Logic board ***'y (QM2-0750 / QM2-0751)

6 times Internal temperature error - Logic board ***'y (QM2-0750 / QM2-0751)

7 times Waste ink absorber full - Ink absorber (QA4-1012 / 1013 / 1014 / 1015 / 1055)

- Bottom case unit (QM2-0647)

8 times Print head temperature rise - Print head (QY6-0042)

- Logic board ***'y (QM2-0750 / QM2-0751)

9 times EEPROM error - Logic board ***'y (QM2-0750 / QM2-0751)

13 times USB Host VBUS overcurrent - Logic board ***'y (QM2-0750 / QM2-0751)

- DCD board ***'y (QM2-0825)

15 times Other hardware error - Logic board ***'y (QM2-0750 / QM2-0751)

Continuous alternate blinking

Flash ROM error - Logic board ***'y (QM2-0750 / QM2-0751)

Lights in orange

RAM error - Logic board ***'y (QM2-0750 / QM2-0751)


Hop you can understand the above as it is straight out of the service manual.

Good luck

May 24, 2011 | Canon BubbleJet i560 InkJet Printer

1 Answer

Recently my printer stopped working. It does not turn more I took the service technician and he told me that maybe I needed to replace the logic board. Where can I Buy the logic board printer brand Canon...

My advise -- replace it.

The problem is that by the time you add up the price of a new motherboard and the technican's labor
costs, it will exceed the replacement cost of a new printer. That is the sad truth about most inkjet printers.
They are generally cheap for a very good reason.

As to the motherboard replacement, you would have to contact Canon technical support for pricing. I
doubt that there is a generic replacement board.

Mar 22, 2011 | Office Equipment & Supplies

1 Answer

I have an imac intel 17" which is kernel

If someone has looked at this issue and determined it to be a logic board problem then the only solution is to replace the entire logic board.

You can purchase them on here for $289:

Here are instructions on replacing the logic board yourself:

Feb 06, 2011 | Apple iMac 17" Desktop

1 Answer

I replaced my logic board 41a5021-3c with 41a5021-2g and the sensor beams are not being powered so the door only wants to go up. Do I need to do something special. This was the reccomended replacement...

Either you got a bad board or you didn't connect the sensors correctly. The 2 solid white wires go to terminal #2 and the 2 white wires with black traces go to terminal #3.

Dec 14, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

I-phone freeze

I don't have exactly a lot off information to work off of here but sually it's broken logic board when that happens. You can try to replace the part yourself, the part is on Ebay, there are iPhone repair guidesthat show you how to do it. There is a service that offeres repairs forthe iPhone 2G, 3G and 3GS and provides a one year warranty on all newreplacement parts. iPhone Repair NYC

Nov 10, 2009 | Cell Phones

1 Answer

Logic board failure

You can do the repair yourself, you need about 3 hours to take apart and re-install. Keep a note of every screw, there are alot of them.

The board may be stuck on by some di-electric grease so pry it off carefully making certain all screws are off, check behind wires etc...

Replace with 6781QCH038C not the 060Q it will not work with LG's but will work for Vizio's

Nov 15, 2008 | LG DU-42PX12XC 42 in. Plasma HDTV

Not finding what you are looking for?
Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ Logo

290 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sears Building Materials Experts

Glenn Mayer
Glenn Mayer

Level 2 Expert

91 Answers


Level 3 Expert

4350 Answers

Cindy Wells

Level 3 Expert

5473 Answers

Are you a Sears Building Material Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides