We want to control our RGB display Backlight using PWM_A of Colibri module. We were able to use PWM_A for toradex EDT 7 " Display. But when we made use of Toradex Generic Display Adapter V2.1 , the same control for display is not happening.When we checked the schematic for the same we found that R36,T2,R37,R40,C6 are written as NA. What does it mean ? Do we need to include this if we want to make use of PWM control of backlight ?