Dropped phone and now the screen has white lines through it.

So I recently replaced my battery and home button and everything was perfect, but today I dropped my phone and it fell flat on its back (in case) and now the touch screen isn't working properly, though sometimes works for a few seconds or minutes when I open it and goes back to being crazy suddenly, and the lcd has white lines through it (they appear after a few seconds when I open it).

Took it apart and disconnected everything and reassembled it but the problem persists. I also noticed some strange sort of tears on the black strip on the metal bracket as you can see bellow. Does this mean I need to buy the entire front panel reassembly or can I just replace the lcd/ digitizer? Any way to tell if there's damage beyond the screen before spending another $50 on this phone?