Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
Posted by Anonymous on
Xheck for power. Does a GFI power the garage outlet. did it trip? Secondly, is your wiring correct. 2 b/w to blk terminal, r/w to red. white (3 of them) to white.
Posted on Jul 11, 2010
It sounds like you have lost power to the opener. Remove the plug and plug in a lamp and see if that works. Could be a circuit breaker. If the lamp works then I would pull the logic board and check for loose connections around the small transformer.
Posted on Jul 09, 2010
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Posted on Jan 02, 2017
SOURCE: Our garage door worked fine
IF YOU HAVE NO LIGHTS - DO YOU HAVE POWER TO THE UNIT???
YOU MAY STILL HAVE A WIRING PROBLEM.
1. VERIFY YOU HAVE POWER AT THE WALL/CEILING OUTLET.
2.- DISCONNECT THE WIRE ON # 1.
MOMENTARILY SHORT ACROSS SCREWS 1 AND 2 ON THE CIRCUIT BOARD - IF THIS CAUSES THE DOOR TO MOVE YOU HAVE A WIRE SHORTED OR NOT PROPERLY CONNECTED.
IF IT DOES NOT CLICK OR MOVE THE DOOR YOU MAY NEED A NEW CIRCUIT BOARD.
HOPE THIS HELPS
IF YOU NEED FURTHER HELP - GO TO LIFTMASTER.COM OR CHAMBERLAIN.COM & DOWNLOAD THE OPERATOR MANUAL - IT WILL HAVE A GOOD DIAGNOSTIC / TROUBLESHOOTING SECTION.
Posted on Jun 11, 2010
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