I have been experiencing non responsiveness from a small portion of my touch screen. To confirm this I ran the touch screen checker app which indicated an area at the extreme bottom right about 1/4 inch high by 1.5 inch wide. It renders launch icons and app soft keys located in this area unresponsive. I have not attempted factory reset yet. I thought I might order a replacement touch screen and attempt to replace it. I wonder if anyone has experienced just a small portion of the touch screen being dead? All other areas of the screen are normal. Has anyone attempted the screen replacement?