Hello guys i have a problem with my N9, i just replaced my broken display after a crash on a small rocks. I got a display without a metal case, so i took the one from the old display and sticked to new one.
The display is blinking on the LPM mode first just the digits on the clolc and after few seconds also the whole display.
When unlocked display colors are almost fine but a little bit some grey spaces are like grey and red. And in landscape mode in web browser i see some very thin grey lines, but only in landscape.
Could it be not a problem in display but in the motherboard after the fall?

Here is a video: https://www.youtube.com/watch?v=KcKB66oOZc8
and a picture when not locked.

Had someone such a issue with display?

I have never heard of these issues before, but I feel like it is more probable that it is a display problem than a motherboard issue.

Have you double checked that all connections are clean and secure?