I have Redmi 4X 3/32 produced in 2017.10.
MAG138, screen type EbbgDJN.
Scripts to check the LED do not work. However, on MIUI9 after installing the package .zip (Do not remember its name, because I checked a lot of them) LED diode lighted RED! However, this package caused a problem with unblocking the screen (The screen was black and only slightly lit up).
I also checked apps like Light Flow (with root), custom roms but the led still remained white.
I think there is hope for a working RGB LED
