You can determine that a garage door opener is failing by listening and watching for distinct mechanical symptoms such as excessive grinding noises, motor humming without moving the belt or drive sprocket, erratic door travel stopping halfway, failure to respond consistently to remote transmitters, or intermittent logic board crashes. If lubricating moving parts and resetting travel limits fails to resolve erratic behavior, internal gears or motor windings have worn out. Verification: Disengage the manual release and test the door by hand to ensure mechanical balance before blaming the motor.
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