BLACKBERRY 9780 WHITE SCREEN .

I have a blackberry bold 9780 which ive brought a new housing for and new trackpad and new battery and a new screen which i had brought, the screen was 40 and the bb shows a white screen maybe because wrong model! the camera is also missing but can order it for 10 or travel to elgate east london and pick 1 up from a reapir shop which the man forgot to put back lol! i think its a minor problem please reply asap