Black screen no mic dock changed same problem

Hi all,

I have a issue with my Nexus 5 for a while now and still don't find a way to solve or at least know what it exactly my issue...

Basically the problem is a black screen and no microphone working... the phone still works but the image doesn't appear..

I open up the phone and changed the this parthttp://www.spareslg.com/conector-micro-u... ( I read somewhere that this should solve the problem and sense it was a cheap fix I gave it a try), and not only I still have the same issue with the screen (sometimes we can actually see if we press the connector in the board) but the mic is not working either...

Can anyone help please...