It is a faulty IC chip connected to the lcd cable on the digitiser.
It's the rectangular hard thing on the cable. Either it came damaged or you damaged it by bending in the wrong place when fitting.
I got this screen from afrapoco ltd on ebay BTW. Have you used them?
Just parts are a good seller on ebay
Hi yes used them once and sent back all 5 screens due to awful quality lcd's all grey and washed out colours.
Unfortunately not, i'd never pay that much.
No offense intended, but that may have something to do with how many faulty screens you are receiving.
Clearly these are all Chinese copies but the cheaper you go the worse quality control and packaging gets.
Get what you pay for yadda yadda.