This video demonstrates what to do if your garage door won't close and the lights on your LiftMaster garage door opener are blinking.
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This video is intended for demonstration purposes only. The procedures demonstrated should only be performed by trained, professional installers and service technicians. Safe operation and servicing requires that you follow all instructions and safety advisories found in the manual.
To locate a trained, professional installer or service technician go to LiftMaster.com/locate-a-dealer.