ok so I am a new flyer, but I bought a used 3dr drone, and I went ahead and reset set it too factory setting and have searched all over the internet for this error. but i cant find a reason behind it. in the front of the drone, it is supposed to have two white/blue lights and two red lights in the rear., but I have three lights. red and one light white/blue. But everything still works, not sure what to do. is this a internal error? light bulb burnt out? no clue. please help.