Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC

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My chamberlain listmaster elite series seems to have locked

The lighted display is off, and I can't open the garage door from the wall switch nor from the in-car button. And I can't budge the garage door. Seems to be locked, even when I pull on the red rope thing. Any ideas for how to turn it back on or get it open manually?

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Make sure the power is on to the opener, plug something else into this outlet if not then check for a tripped circuit breaker at your main power panel. if yes wait a couple minutes then plug it back in and try it. also check for a reset button on the rear and make sure it is depressed. to open manually have someone put downward pressue on the door while you pull the rope down and forward.

Posted on Feb 13, 2009

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