After screen repair: Interface overlap and proximity sensor problem

Hello everybody,

I had to replace my LGG2 D802 screen and now have the problem with the proximity sensor. The screen goes instantly off after powering it on. I tried the tips with the paper as pressure but it still only works under direct light and not in a "dark room".

My other problem is the interface for example in the SMS Message app the messages are over the complete screen and are therefor covered by the interface.

I guess the reason is that the connection were the yellow arrow points. It doesn't really hold and I don't know why.

I am thankfull for any help.

Have a nice day