Hello I have Xperia Z1 Compact with a broken screen. I have ordered a replacement screen from ebay. When I connect the screen to the phone and turn it on, nothing happens. I know that the phone works because I hear boot up sound. Also when I press unlock button and then volume up/down keys I can hear the volume change sound. If we assume that the replacement screen is working, what could be wrong with the phone? Is there anything I could do to fix it?