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888LM slow blinking with Overhead Door opener?

888LM not working with supposedly compatible Overhead Door opener. Getting fast blink to start and then slow blinking with a couple beeps mixed in as well. Overhead Door 1029 is my unit and should be compatible according to the website list of units. Reading of some others that say need new logic board? Is that board for the 888LM or for their opener? Help!!
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