My iPhone's screen turns off if I do not press it around the top. I have replaced the "Power Mute Volume Button Switch" connector since the "Power Button" stopped working too. It didn't solve the power button problem nor the screen turning off problem. Currently, I'm using my phone with a "Binder Clip" (http://getsimplifized.com/wp-content/uploads/2011/02/binder-clip.jpg) placed at the top. And with the assistant in order to turn off the screen (power button). Any ideas on what might be causing my problem??