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

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Garage door circuit board replacement

I replaced my garage door circuit board that I was told to be the problem the door wouldn't work. It is a Genie 2020L. I was careful to reconnect all like before. The button to open the door now works but nothing happens when I push it. There is a blinking light when I press a button up by the circuit board, before nothing would light up. Please help!!! Thanks, Mickey

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Get instructions and program. I hate Genie

Posted on Jan 15, 2009

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You have loose wire(s). After speaking with Genie Customer Service, they had me disconect a few of the wires and try operating the unit, to no avail. I noticed when reconnecting the wires that several other wires on the same row of connections were loose. I tightened all wire connections and VOILA, it works.
1.Open plastic cover in front of the Unit.
2. Look on upper right corner for a row of screws. Model 2020L has a verticle row of (6) connection screws numbered from top to bottom, 1-6. These screws connet to a green circuit board. Looks kind of like a video card from a computer.
3. Tighten all these screws top to bottom assuring good connection of all wires.
My contention is this. As the motor runs, it causes a vibration that tends to loosen those screws causing a faulty connection to the circuit board. Hope this works for you.
Delta Dan

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