No display after repair.

I just tore down my S7 edge to fix the front cracked screen. I removed the back first took out the mother board. I didn't take out the battery, only because the tutorial I watched didn't do so. I probably should've taken apart the whole thing just to avoid the issue im about to explain. I didn't take the battery out only the mother board. I removed the front glass but I think i dug into the LCD while I was trying to remove it, but(not from the back assembly)The LCD was slightly loosened at the top of the screen after I took the front screen out. I didn't remove the whole LCD display. I reassembled the phone back but the display doesn't work. I do get a lit home button and back arrow button, but the display doesn't show anything. I dont have a way to tell. Can someone explain if its just my LCD that needs repaired in this case. As explained earlier, I think I duged into the LCD when i was trying to remove it completely from the unit. I ended trying to take a short cut leave the LCD on there and not pull it off completely. now the display is not showing, do I need to replace it only? The power comes on and I can see the buttons at the bottom light up, but no display. The loca uv glue under the LCD is all smushed in the corners and edges when i attempted to remove it. Also if i may add, the flex cable at the top of the LCD i loosen because there was a strange orange thin plastic cover i tore off when i removed the screen. I removed it because it seem to be some protectant between the screen and LCD. Another thing was I applied some heat to the phone while the battery was still on there, and the bottom charging assembly unit was still attached, but not too much , but Im also not sure if that could. Please help me understand. I ordered another LCD display for a whole lot some other online store that is less expensive than on here, but Im not entirely sure thats the problem. Im just trying to assure by me buying the new LCD display that will fix my issue?