Samsung Galaxy A tab 6

Hi iFixit

I got a Samsung Galaxy A tab 6, where i replaced the screen and LCD on it. For some reason only the top half of the screen respond to touch, i've tried to clean of the cable and made sure all cables are plugged correctly in.

Nothing seems to work and there is no guide for a screen replacement for this device.

Do anyone have a clue what is wrong, is it just a bad screen i've got.