My Samsung galaxy S2 fell down but The touch screen works perfect, and not a mark on the outside of the screen. It started as a little bit of what looked like purple-blue ink in the bottom corner, and over about a day or two it covered the whole screen making it completely black. Do you know what is wrong with it? Do i have to change the whole display screen or its just the led in the phone that needs to be changed? Will the phone memory get lost once i change the display screen? Think i read somewhere that it could be due to pressure damage, no idea how it has happened. Thanks for any help.