I have dropped my phone on the ground a few times. I have cracks on the screen (Not sure if that's why my cam isn't working) And just recently I had opened my Camera app and how I see the picture (or through the Camera) It appears Pink. And I cannot see anything but pink. I have sometimes just roughly tapped on the lens and it turns to normal, but it keeps going back to the same way it was previously. Linked is a photo of the back of my HTC phone. hopefully it'll help! Thanks!
***I am missing the circular piece on my Camera (Or AKA the rim of the camera)*****
[http://tinypic.com/view.php?pic=21zgr7&s=8#.VTUkAl33-iw]