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

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I have an intermittent problem with the power going out on my craftsmen opener. If I bang on the end where the wires are attached the lights come on and it works for a while. I opened it up and all the connections look fine. Any ideas?

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You need to remove the logic board and check for loose connections on the printed circuit board especially around the small transformer. The logic board is on the end you are banging.

Posted on Jul 08, 2010

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