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liftmaster garage will not open, red/yellow led blink and beep

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liftmaster garage will not open, red/yellow led blink and beep, Model and issue: crwdns2935265:00crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 liftmaster garage will not open, red/yellow led blink and beep, Model and issue: crwdns2935265:00crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 liftmaster garage will not open, red/yellow led blink and beep, Model and issue: crwdns2935265:00crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
Model and issue

  • This is the door opener, 888LM. I had a constant red/yellow light blinking and a beep coming from the unit. Replacing the garage door opener main board, did not change anything. (screw is marked)

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