Hey guys. I was recently given this iPhone 4 16gb from a friend who had broken it. The screen has lines and a black blob in the corner. See attached pics. I also uploaded a video to Youtube HERE. In the video you can see the colours are all wrong and such. Apologies in advance for the potato quality, btw. So basically I want to know, is this definitely a broken screen? I imagined there would be apparent physical damage. It was dropped on a hard floor if I remember correctly. Something to note is that it's had a screen replacement before as you can probably tell from the red casing. So before I drop £20 on a replacement front assembly, could it possibly just be a loose cable from the drop? Or is it almost certainly broken? Thanks, and sorry if this was kind of long winded.