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

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Chamberlain Craftsman garage door opener

Our garage door opener for the past year will work and sometimes not, now mostly not. If you hit the unit hard the light pops on. other times no light no power, power to unit is has been tested and fine. any suggestions?

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  • bob6805 Oct 05, 2008

    Same problem, I took the cover off and unit worked for a couple of weeks, now i have to bang on the unit again. Seems like an electrical short or problem with the logic board.

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Replace the logic board. I have seen this problem in the field. More often than not it's due to power surge or lightning strike.

Posted on Oct 07, 2008

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