No Keyboard Backlight and No Screen backlight but computer works!

So i bought an a1502 for cheap from someone in hopes of being able to fix it . I dont know exact model but its got 8gig of ram and retina display. When i power it on , the machine makes the chime noise and i placed a light up to the apple logo and could see the login screen so the display seems to be working just no backlight. Also the keyboard backlight is not working. I checked fuses visually and everything else that i could think of but the only thing i saw that was bad was the keyboard backlight connector (or at least i think that is what it is ) …does that control backlight of screen too ?