



Now you must use the F5 and F6 keyboard keys to manually control the key backlighting level, this becomes the only way the illumination is impacted. This problem is due to you might have pressed F5 button(This sets the light to 0). I tried enabling “ Illuminate in low light conditions”(System Preferences –> Keyboard & Mouse option) but still the problem exists. Macbook Pro keyboard backlight stopped working suddenly.
