Most things do not work after screen replacement
I have replaced the screen on an iPhone7 Plus. everything worked before. Now several parts are not working. Home button, front camera, proxy sensor, and volume controls and sound or vibration do not work, however the slide for the ringer mute does work. I have changed the front flex cable to a new one, and still nothing different. Since the flex cable is located on the back side of the phone and not the screen part I just do not see how this would have affected the volume controls or the vibrator. Since none of this was touched. The back camera does work. Any idea what could be going on here? Help needed on this one.