I don’t know what the problem was, but I updated bios and then reset it to default setting and somehow it worked. Now I also overclocked ram and everything works perfectly!! Thank you very much for the respond!
Hello, as everyone says iPhone 7 / 7+ home button transfer is very common to damage the flex. Apple asked me for 7 plus 220€ to change home button with screen. I make some research and finally found this solution https://www.youtube.com/watch?v=rwznLFI1... I gave it a try because I had nothing to lose and worked. It’s very difficult and complicated, but you should give a try.