No matrix backlight on msi ms-163n schematic

[geniusbo]

Help is needed. The converter is not supplied with voltage 3.3 to turn on the matrix. The adjustment when you press fn works, I checked it by connecting a 3v battery - the backlight works. There is no enable signal on the motherboard on the pin. Maybe you have a diagram for it. msi ms-163n1 rev 1.0
sorry for my English