I would check that all the rotors are secure nd all motors are free to move, if one is loose or the motor is not running free the it won't lift. This maybe the reason why one led is not lit. The same thing happened to my mtech sky drone pro and I found I needed to replace the motor, a very simple and cheap fix. However my LED'S did all work as normal.
Try contacting Menkind online to seek advice or return the drone.
Sorry I can't be much more help.