hey im sorry im new here and idk well how this forum works and i just read your question. I have the same phone and last week all of the sudden I was playing songpop and I set my cell to charge and when I went to answer a call on my cell the touchscreen wont respond at all. i had to reset the cell and lost everything bcs i wasnt even able to unlock it. anyways a friend of mine told me that one cable , the one from the flex for the touch part was cut and looks like the same you mention above. he told me probably bcs of the daily use the cable was cut, close and opening the cell. And I cat find that thing to get it fix i dont even know the name. Please if you did find the name can you tell me.
IM SO VERY SORRY FOR THE LONG POST TOO BUT I LOVE MY PHONE REALLY AND THE ONLY ONE I HAVE NOW :S