Touch screen ghosting glitching

Hi

I am wondering if I can get some advice. I've replaced the LCD and digitizer. The touch id doesn't work and show unable to activate. So I put in the home button which came with device but it's like doing it own thing and clicking on things on screen and it doesn't work in the corners when I try to exit a page. Is this likely to be a faulty digitizer or the logic board. Hope I can get some advice. Hoping someone can help