Problem with screen after trying to fix proximity sensor on iPhone 4
Hi there. First, this is my first time opening an iphone. I watched many videos and guides on how to take off the display and fix the proximity sensor. I used the technique with the scotch tape but it didn't work for me. I didn't actually used scotch tape but a clear tape. Maybe this is why the proximity sensor doesn't work. If anyone can also help me with that i would be greatful.
Anyway... after reassembled the iphone i noticed a big blue dot at the screen. See the picture here.
Is the screen damaged? Or did i connect something wrong?
Notice that before opening the iphone i used the same screen and it was working perfectly fine.
I also had a difficulty on reassembling the logic board. I think it's not perfectly positioned. Are there any detailed instruction on how to reassembe it correctly? Or a video?