If the little black clip on the holder down, use ur nail and lift it up.
I dont mean the golden coloured ribbon on the left, that works fine, its the other ribbon on the top right that i need help with, it came out, (it connects into a holder on the other side of the motherboard)its kinda clear coloured with like brown conection ribbons i think.
My ds turns on fine (that doesnt happen if the other ribbon is loose) and the touch screen comes on and displays everything normally but i cannot use it to touch stuff!!!