Video
https://www.youtube.com/watch?v=Opl0498DAXk
And
How To Disassemble Samsung Galaxy S2
https://www.youtube.com/watch?v=OCGBZKWWjfE
Battery not charging
http://www.ifixit.com/Answers/View/135988/My+phone+will+not+take+any+charge+any+idea
How to Fix / Replace / Change / Repair broken Screen / LCD / Digitizer / Display / Touch Screen video tutorial.
https://www.youtube.com/watch?v=w73KJAbKqXI