Samsung Alpha SM-G850F Display Light Solution Ways
https://gsmfixer.blogspot.com/2015/11/samsung-alpha-sm-g850f-display-light.html
Usually e do not see Samsung Alpha SM-G850F Display Light Problem becuase the led light are placed inside the LCD. So if the LED are not working then there is a problem in the LCD so you can replace it and check again. If the LCD is working fine and still there is no light then go for a repairing solution that is given in the diagram.
