I had the same issue with my beats X six months ago and apple replaced them under warranty. Fast forward another six months to last week, same issue arised where the light comes on when charging but goes out when unplugged. I called apple and they said my beats X was 3 months out of warranty and asked for $90 to replace. It’s apparent that these headphones are poorly designed and apple being a trillion dollar company refuses to fix or acknowledge the defect in its product. My Apple TV 4th gen also stopped working out of the blue for no reason and apple refuse to help. With over 30 apple products in my home, I am very disappointed and I will not be buying anymore apple products.