https://www.ifixit.com/Answers/View/881775/Orange+Light+on,+but+it+is+not+connected+to+laptop!
Orange Light on, but it is not connected to laptop! - Apple MagSafe2 Power Adapter - iFixit
This is a weird one, The orange light is ON on the connector but it isn't connected to the laptop.... It still charges the battery and goes Green to Orange...