I had the same problem until I tried another usb port. If all fails try restart the kinect monitoring service. Make sure that you have enough space so that the kinect v1 can see your entire skeleton, try find a lens that increases the fov of the sensor bar. Make sure that when you are putting up the kinect for use make sure that it is around eye level facing towards your play area.
The kinect flashing green light basically means that the kinect cannot see your entire skeleton and also happens when one of your “bones” goes from green to invisible.
If you cannot see you skeleton on the kinect calibration then try the stuff above me.
Hope this helps, Dunk.